Key Takeaways
- Retargeted visitors are roughly 70% more likely to convert than non-retargeted traffic, and some studies show conversion lifts of up to 147% when retargeting is done well.worldmetrics.org
- B2B teams should treat retargeting as an extension of sales development, using ads, emails, and SDR touchpoints to bring back demo requesters, pricing-page visitors, webinar no-shows, and leads that went dark.
- B2B retargeting campaigns have 147% higher conversion rates than B2C retargeting and can increase brand awareness by 71%, customer retention by 59%, and lead generation by 39% for B2B companies.demandsage.com
- Retargeting ads regularly deliver click-through rates 10x higher than standard display (0.77% vs 0.05%) while cutting cost per lead by about 50% compared with other digital channels.worldmetrics.org
- Email and recovery flows are still monsters: well-run recovery sequences see open rates around 50%, click rates above 6%, and conversion rates in the 3-7%+ range, and recovered orders are often 58% higher in value.amraandelma.com
- Companies with sophisticated nurturing (including retargeting) generate 50% more sales-ready leads while cutting cost per lead by 33%; automated nurture emails alone can drive 320% more revenue than one-off blasts.thedigitalbloom.com
- The bottom line: B2B sales orgs that align retargeting with SDR/BDR outreach, use clear intent-based segments, and rigorously cap frequency will recover more leads, protect their brand, and build a fatter, healthier pipeline.
Most B2B buyers won’t book a meeting on the first touch, but retargeting gives you a second and third shot at the same high‑intent leads. Done right, retargeting campaigns deliver click‑through rates up to 10x higher than standard display and can cut cost per lead by about 50%. This guide shows B2B sales and marketing teams exactly how to use ads, email, and SDR outreach to recover lost leads and turn “maybe later” into booked meetings and revenue.worldmetrics.org
Introduction
Most B2B buyers don’t convert on the first touch. They click an ad, skim your pricing page, maybe start a demo form… then disappear into the ether.
From a sales development perspective, that hurts. You paid to get them interested, your SDRs are starving for good leads, and meanwhile a big chunk of your traffic is just leaking out of the funnel.
That’s where retargeting campaigns come in. When you use them as an extension of your SDR motion-not just as a generic ad tactic-you can systematically recover leads, re‑engage accounts that went dark, and give your reps far warmer conversations.
In this guide, we’ll break down how to:
- Understand retargeting in a B2B sales development context (not just ecommerce)
- Use LinkedIn, Google, and email from a pipeline‑first perspective
- Build full‑funnel retargeting programs that support SDRs, not compete with them
- Run specific plays to recover demo abandons, no‑shows, and stalled opportunities
- Measure impact using pipeline and meetings, not just clicks
By the end, you’ll have a playbook to squeeze more revenue from the traffic you already have-and a clearer picture of how an outsourced SDR partner like SalesHive can plug into your retargeting strategy.
What Retargeting Really Means in B2B Sales Development
Beyond “Banner Ads That Follow You Around”
When most people hear “retargeting,” they picture display ads chasing them across random websites. That’s part of it, but in B2B sales development, retargeting is much broader:
- Ad retargeting, LinkedIn, Google, and social ads shown to people who visited your site, engaged with content, opened forms, etc.
- Email retargeting, Triggered sequences for demo form abandons, webinar no‑shows, content downloaders, or cold prospects who went quiet.
- SDR‑led retargeting, Call and email plays triggered by behavioral signals (e.g., pricing‑page visits, repeat site sessions, ad engagement).
The common thread: you’re not cold anymore. You’re re‑engaging leads that already touched your brand-which means a higher probability of a real sales conversation.
Data backs this up. One 2025 report found that retargeted visitors are about 70% more likely to convert than non‑retargeted visitors, and that retargeting can boost conversion rates by up to 147% in some scenarios. Retargeting ads also deliver around 0.77% CTR vs. 0.05% for standard display, roughly a 10x lift, while cutting cost per lead by about 50% compared with other channels.
When you’re paying good money for every click, ignoring retargeting is like letting half your marketing budget evaporate.
Why B2B Retargeting Is a Different Beast
Retargeting started in ecommerce-think abandoned carts-but it’s arguably more powerful in B2B:
- B2B retargeting campaigns report 147% higher conversion rates than B2C retargeting.
- B2B companies using retargeting see lifts of 71% in brand awareness, 59% in customer retention, and 39% in lead generation.
Why the outsized impact?
- Deals are big and complex. You’re often chasing six‑figure ACVs with multi‑stakeholder buying committees. Staying visible is half the battle.
- Audiences are small but valuable. You might only have a few thousand accounts in your ICP. Every re‑engaged contact matters.
- Cycles are long. People research silently for months. Retargeting keeps you on their radar until they’re ready to talk.
In other words, retargeting isn’t just about “getting the click.” It’s about shortening sales cycles, improving win rates, and making SDR outreach feel familiar instead of cold.
Core Retargeting Channels for Recovering B2B Leads
1. LinkedIn Retargeting: Your B2B Workhorse
If you sell B2B, LinkedIn should be near the top of your retargeting list.
Four out of five LinkedIn members help drive business decisions at their companies, and LinkedIn data shows that retargeting campaigns on the platform can increase CTR by ~30% and decrease cost per conversion by ~14%. That’s a big deal when you’re paying LinkedIn CPMs.
How to use LinkedIn retargeting for lead recovery:
- Website visitor audiences. Install the LinkedIn Insight Tag and create audiences based on specific URLs-like `/pricing`, `/demo`, `/case-studies`, or solution pages. Then tailor ads to those signals.
- Pricing‑page visitors: show ROI‑driven ads and “Talk to sales” CTAs.
- Blog readers: promote relevant webinars, guides, or comparison content.
- Case‑study viewers: share social proof and lightly push meetings.
- Engagement-based audiences. Retarget people who watched your LinkedIn videos, opened Lead Gen Forms, or engaged with thought‑leadership posts. Serve deeper‑funnel offers only after they’ve shown real interest.
- ABM overlay. Combine retargeting with account lists. Retarget only the accounts your SDRs care about, filtered further by job title, company size, or function.
One best practice from LinkedIn experts: use retargeting as part of a full funnel. Top‑of‑funnel campaigns drive initial awareness; retargeting nurtures that audience with more detailed content; bottom‑of‑funnel retargeting finally pushes demos, trials, or consultations.
2. Google Ads Retargeting: Catching Buyers Across the Web
Google remarketing lets you follow prospects across millions of sites and within YouTube, which is handy when your buyers aren’t living on LinkedIn all day.
For B2B lead recovery, Google works especially well for:
- Search remarketing (RLSAs). Bid more aggressively on people who’ve already visited your site when they search category keywords again-these are high‑intent, re‑engaging prospects.
- Display remarketing. Show banners or responsive ads to previous visitors, especially those who hit key pages like pricing, product tours, or integration docs.
- YouTube retargeting. Retarget visitors with short explainer or testimonial videos, then drive them back to high‑intent landing pages.
Because retargeting click‑through and conversion rates are much higher than cold display, you often see far better ROI here than with broad prospecting campaigns. Remember, studies show retargeting campaigns cut CPL by roughly 50% compared with other digital channels.
3. Email Retargeting & Recovery Flows
Email isn’t sexy, but it absolutely prints money when you treat it as a retargeting channel instead of just a monthly newsletter.
Research on recovery marketing shows:
- Recovery emails see ~50% open rates, 6%+ click‑through, and ~3.3% conversion on average, with top decile programs reaching almost 7.7% conversion.
- About 50% of clickers go on to complete a purchase or conversion, and recovered orders tend to have 58% higher average order values than standard purchases.
Yes, those numbers are often from ecommerce, but the pattern holds in B2B: timely, behavior‑triggered emails massively outperform generic campaigns.
For B2B sales development, think in terms of:
- Demo form abandonment flows, If someone starts but doesn’t submit a demo or contact form, trigger a 2-3 email sequence: a reminder, an offer of help, and an easy reschedule option.
- Webinar no‑show recovery, Send the recording, a short summary, and a soft CTA to book time and discuss their specific use case.
- “Went dark” re‑engagement, If prospects ghost after a few SDR touches, drop them into a long‑tail nurture series with case studies, product updates, and occasional, low‑pressure CTAs.
Sophisticated nurturing programs that use this kind of triggered email plus retargeting generate 50% more sales‑ready leads at 33% lower CPL, and automated nurture emails drive 320% more revenue than manual one‑off blasts.
4. SDR‑Led Retargeting (The Human Layer)
Ads and emails warm up the ground; SDRs plant the flag.
Your SDR team should have direct visibility into who’s engaging with retargeting campaigns-who’s clicking ads, revisiting pricing, opening nurture emails-and use that to prioritize outreach and personalize conversations.
Example motions:
- “Hot intent” call blocks. Every morning, SDRs get a list of accounts that:
- Visited pricing or product pages multiple times
- Clicked a bottom‑funnel retargeting ad
- Opened and clicked a demo reminder email
Those accounts get priority call blocks and custom emails referencing the exact content they engaged with.
- Soft‑touch social outreach. When someone repeatedly engages with LinkedIn content or ads, SDRs send a non‑pitchy connection request: “Saw you checked out our X guide-happy to send a summary or answer any questions if you’re evaluating tools in this space.”
Retargeting isn’t just about ads; it’s about arming your SDRs with context so their outreach feels eerily relevant-in a good way.
Building a Full‑Funnel Retargeting Strategy
You don’t need 20 campaigns. You need a few tight, intentional flows that map to how your buyers actually move.
Step 1: Map Buying Stages to Signals
First, get brutally clear on which behaviors signal different stages of intent. For example:
- Early‑Stage / Curious
- First visit to a blog or homepage
- Viewed a high‑level solution page
- Watched a short awareness video
- Mid‑Funnel / Evaluating
- Downloaded a whitepaper or guide
- Attended (or registered for) a webinar
- Viewed multiple solution or use‑case pages
- Bottom‑Funnel / In‑Market
- Visited pricing or ROI calculator pages
- Started a demo or contact form
- Returned to the site multiple times within a week
Each group deserves different treatment. If you blast everyone with “Book a Demo,” most will ignore you and some will form a negative impression.
Step 2: Design Offers for Each Stage
Now, define one main offer per stage:
- Top of funnel (TOFU), Educational content: blog posts, ungated guides, short videos, industry benchmarks.
- Middle of funnel (MOFU), Credibility builders: case studies, ROI calculators, webinars, comparison guides.
- Bottom of funnel (BOFU), Direct revenue moves: demos, consultations, free trials, tailored assessments.
Retargeting just decides who sees which offer, and when.
A simple rule of thumb:
- If someone only viewed a blog → retarget with more content + light CTA.
- If they consumed a deep asset or repeat‑visited solution pages → show case studies and proof.
- If they hit pricing or started a form → it’s fair game to offer a demo, with SDRs on standby.
Step 3: Build Audiences Around Key Behaviors
Using your ad platforms and marketing automation, create audiences like:
- “Visited /pricing or /demo in last 30 days, no opportunity in CRM”
- “Downloaded content but never booked a meeting”
- “Attended webinar but didn’t talk to sales”
- “Active opportunity that went ‘stalled’ or ‘no decision’ in last 90 days”
Then map each audience to:
- Ad retargeting (LinkedIn, Google, maybe Meta)
- Email flows (if you have their contact info)
- SDR plays (call + email sequences)
This is where a lot of teams benefit from a partner like SalesHive. Building solid lists, enriching them, and keeping CRM data clean enough to power these audiences is way easier when SDRs and list‑building are handled by specialists using tools like SalesHive’s AI‑powered eMod personalization engine.
Step 4: Set Frequency Caps and Guardrails
Retargeting without guardrails is how you become “that annoying vendor.”
Start with:
- 3-5 impressions per user per week per platform for retargeting campaigns
- Tight budgets for very small ABM audiences
- 30‑day audience windows for hot intent (pricing, demo), 90‑day for earlier‑stage interest
Then watch for:
- Declining CTR or rising CPC → sign of fatigue
- Negative feedback or ad hide rates → you’re overdoing it
- Stagnant conversion rates → your offer or creative isn’t resonating
Rotate creative every few weeks and don’t be afraid to pause under‑performing audiences instead of endlessly “optimizing” them.
Step 5: Align Attribution and Reporting
Retargeting often doesn’t get full credit in last‑click attribution, because the final conversion might be a demo booked from an SDR email or call.
Before you scale budget, make sure you:
- Install pixels correctly (LinkedIn Insight Tag, Google Ads tag, etc.) on all key pages, not just landing pages.
- Capture campaign and audience data in your CRM when someone converts.
- Use at least assisted‑conversion and multi‑touch views in your reporting.
You want to see patterns like:
- “Opportunities with at least one retargeting touch have 20% higher close rates.”
- “Accounts exposed to LinkedIn retargeting convert to pipeline at 1.5x the rate of non‑exposed accounts.”
Those are the numbers that win budget conversations with finance.
Concrete Retargeting Plays to Recover Lost B2B Leads
Let’s get specific. Here are some battle‑tested plays you can swipe.
Play 1: Demo Form Abandoners
Situation: A prospect starts your demo or contact form, then bails before submitting.
Why it matters: They were close. Something-time, friction, second thoughts-got in the way.
How to recover them:
- Audience setup
- In your marketing automation tool, track form “starts” vs. “submits.”
- Create a segment of visitors who loaded the form page but never hit the thank‑you page.
- Email sequence (if you have their email)
- Email 1 (within a few hours): “Looks like something interrupted you-still interested in chatting?”
- Email 2 (24-48 hours later): Share a short customer quote or stat + one‑click calendar link.
- Email 3 (optional): Offer a lower‑commitment CTA, like “Reply with your top question and we’ll send a short answer or 2‑minute Loom.”
Multi‑email recovery sequences consistently outperform one‑off reminders, according to 2025 studies on abandonment email patterns.
- Ad retargeting
- LinkedIn/Google audiences: “Visited /demo but not /thank‑you in last 14 days.”
- Creative: Social proof (“See how X cut onboarding time by 40%”) + “Talk to an expert” CTA.
- SDR play
- If they’re in your CRM, have SDRs run a two‑touch call + email referencing the form start: “Saw you checked out our demo page-happy to give you a quick overview or send a short video if that’s easier.”
Play 2: Webinar Registrants & No‑Shows
Situation: Someone registers for your webinar, but either no‑shows or attends and leaves before the pitch.
Recovery motion:
- Post‑event email (to both attendees and no‑shows)
- Replay link + short highlight reel
- CTA to book a short, tailored session to apply the content to their situation
- Retargeting ads
- Audience: “Visited webinar registration/thank‑you pages or watched >25% of video”
- Creative: Clips, quotes, and case‑study‑driven ads pushing related content or demos
- SDR follow‑up
- Prioritize: No‑shows from target accounts and senior titles.
- Talk track: “We hosted a session on [topic] you registered for-mind if I send the 3‑minute summary and see if it’s relevant to what you’re working on this quarter?”
Play 3: Content Downloaders Who Never Talked to Sales
Situation: Prospects download your big guide, whitepaper, or benchmark report… and then vanish.
These are classic marketing‑generated leads that slip through the cracks if SDRs lack context.
Recovery motion:
- Segment by asset type. People who downloaded “2025 Security Benchmark Report” should not get the same retargeting as those who grabbed an “Intro to X” cheat sheet.
- Retarget with related content.
- Ads and emails highlight 1-2 key stats from the asset and invite them to see how similar companies solved the problem.
- SDR outreach time‑boxed to engagement.
- SDRs only go after downloaders who:
- Also clicked a follow‑up email, or
- Visited high‑intent pages after the download.
This keeps SDRs focused on warm, engaged leads rather than hammering everyone who ever filled out a form.
Play 4: Stalled Opportunities / “No Decision” Deals
Situation: Deals that sit in pipeline forever, or end in “no decision,” are perfect candidates for retargeting.
Recovery motion:
- Create a “stalled/no decision” audience.
- Export or sync accounts with opportunities closed as “no decision” or stuck in late stages beyond a certain age.
- Upload as matched lists to LinkedIn and Google, and tie their domains to website visitor retargeting.
- Message around trigger events.
- Ads focus on new features, new customer wins, or fresh ROI proof.
- Email series shares relevant case studies, especially from competitors’ customers.
- Light, periodic SDR check‑ins tied to engagement.
- Don’t have reps chase these every week. Instead, have SDRs re‑engage when:
- Someone from the account clicks a retargeting ad
- Multiple contacts return to high‑intent pages
Closed‑lost and “no decision” aren’t dead; they’re just expensive warm audiences. Treat them accordingly.
Play 5: Competitor Displacement
Situation: You lost a deal to a competitor, but you know implementation pain is coming.
Recovery motion:
- Put those accounts into a long‑term, low‑frequency retargeting track focused on:
- Comparison content
- Migration stories
- Customers who switched from competitors
- Run quarterly SDR outreach that adds value:
- “We just published a checklist for teams rolling out [category] tools-happy to send if helpful as you onboard with [competitor].”
Your goal is to be the first call when renewal time comes or when their chosen vendor stumbles.
How This Applies Directly to Your Sales Team
Let’s bring it back to the people actually dialing and emailing.
Give SDRs Clear, Actionable Signals
Your SDRs don’t need to become media buyers. They just need simple answers to:
- Who is warming up right now? (Recent ad clicks, high‑intent page visits, email engagement)
- What did they engage with? (Topic, offer, creative angle)
- What should I do next? (Playbook: call script, email template, social touch)
That means piping retargeting data into your CRM or sales engagement platform and building queues or views like:
- “Visited pricing page 2+ times in last 7 days, not yet contacted.”
- “Clicked LinkedIn case‑study ad and opened last nurture email.”
- “No‑showed last week’s demo, watched replay.”
When an SDR can open a lead and instantly see, “They just clicked our ‘Cut onboarding time by 40%’ ad and visited /pricing,” the conversation writes itself.
Align SLAs Between Marketing and SDRs
Retargeting only recovers leads if someone follows up.
Set explicit agreements such as:
- Marketing will:
- Build and maintain stage‑based retargeting audiences.
- Surface engagement signals and intent scores in the CRM.
- SDRs will:
- Touch hot‑intent leads (pricing visits, demo form abandons) within X hours.
- Run Y‑touch sequences for specific retargeting triggers (e.g., webinar no‑shows).
Review results in joint pipeline meetings, not separate marketing and sales huddles. Look at meetings and pipeline created from retargeting‑influenced leads as a shared win.
Train Reps to Reference Digital Behavior Naturally
Nothing kills a relationship faster than sounding like a stalker.
Coach SDRs to weave behavior into calls and emails in a helpful way:
- Bad: “I see you visited our pricing page at 3:42 p.m. yesterday.”
- Better: “A lot of folks who read our [topic] guide start asking about pricing next. Happy to give you a quick sense of where customers like you typically land.”
Lightly referencing content and outcomes, not timestamps and URLs, keeps things human.
Use Retargeting to Support Outbound, Not Replace It
For outbound‑heavy teams, retargeting should make cold outreach feel warm:
- Upload outbound target lists to platforms like LinkedIn and Google as matched audiences.
- Run light, helpful ad campaigns (thought leadership, benchmarks, customer stories) to this list.
- Then have SDRs reach out; prospects have already seen your brand and message.
You’re not just pounding the phones-you’re surrounding accounts with consistent, value‑driven messaging.
This is exactly how firms like SalesHive run multi‑channel programs: outbound email and calling to break into accounts, plus coordinated digital touches that prime the conversation.
Conclusion: Make Every Click, Visit, and Ghosted Demo Count
Most B2B teams focus 90% of their energy on net‑new demand-more leads, more impressions, more traffic. Meanwhile, a massive amount of value is sitting in:
- Demo forms that were started but never submitted
- Webinar registrants who didn’t attend
- Content downloaders who went quiet
- Opportunities marked “stalled” or “no decision”
- Closed‑lost accounts that might churn on their chosen vendor
Retargeting is how you systematically go back and mine that gold.
The data is clear:
- Retargeted visitors are about 70% more likely to convert than cold visitors.
- Retargeting campaigns can deliver 10x the CTR of standard display and 50% lower CPL.
- Sophisticated nurturing and retargeting programs generate 50% more sales‑ready leads at 33% lower CPL and significantly higher revenue per lead.
From a sales development standpoint, that translates into:
- More meetings with the right accounts
- Warmer conversations for SDRs
- Less wasted spend on random cold impressions
You don’t need a giant martech stack or a seven‑figure ad budget to start. You need:
- A clean ICP and buyer‑stage map
- A handful of high‑intent audiences
- Simple, stage‑appropriate offers
- Reasonable frequency caps and clear SDR playbooks
If you’ve already got an in‑house team and tech in place, use this guide to tighten the screws. If you’re light on resources or just don’t want to build all of this from scratch, that’s where an outbound partner like SalesHive can plug in-handling list building, cold email, and cold calling while you layer on retargeting for maximum impact.
Either way, don’t let good leads die after one touch. With smart retargeting, you get a second, third, and fourth chance to turn curiosity into pipeline-and pipeline into revenue.
📊 Key Statistics
Partner with SalesHive
SalesHive has booked 100,000+ meetings for more than 1,500 B2B clients, so we’ve seen what actually moves the needle when you’re trying to recover leads that went silent. We can own the entire outbound engine-list building, cold email, cold calling, and appointment setting-while your marketing team layers on retargeting ads and nurture flows. Or, if you’re light on internal resources, our team can help you define segments, build sequences, and plug our activity data into your remarketing strategy. With no annual contracts and risk‑free onboarding, you can test a combined SDR + retargeting motion without betting the whole quarter on it.
❓ Frequently Asked Questions
What exactly is a retargeting campaign in a B2B sales context?
In B2B, a retargeting campaign is any coordinated effort to re-engage people or accounts that have already interacted with your brand but haven't yet taken the next step you care about-usually a meeting, demo, or proposal. That can mean paid ads targeting past website visitors, triggered email sequences for abandoned demo forms or webinar no-shows, or SDR call blocks based on behavioral signals. The key is that you're not talking to strangers; you're following up with warm prospects who've already raised a hand in some way.
How is B2B retargeting different from B2C retargeting?
B2B retargeting typically deals with longer sales cycles, smaller but higher-value audiences, and buying committees instead of individual consumers. You're not chasing a single cart checkout-you're helping a whole team move from awareness to consensus and then to decision. That's one reason studies show B2B retargeting can have 147% higher conversion rates than B2C, along with big lifts in brand awareness and lead generation; when you stay in front of a tight ICP list, each incremental lift matters more.demandsage.com
Which channels work best for B2B retargeting to recover leads?
For most B2B teams, the core retargeting stack is LinkedIn Ads, Google Ads (display/search), and email, with Meta sometimes layered in for reach. LinkedIn is powerful because four out of five members help drive business decisions and retargeting there increases CTR and lowers cost per conversion, while Google remarketing lets you follow visitors across the web.marketingscoop.com Combine that with triggered nurture emails and SDR outreach tied to behavioral signals, and you have a full-funnel recovery engine.
How do I measure whether my retargeting campaigns are actually helping my SDRs?
Don't stop at impressions and clicks-those metrics are table stakes. Tie your retargeting audiences into your CRM and look at cost per opportunity, pipeline created, and meetings set that include at least one retargeting touch. Track whether accounts exposed to retargeting convert to opportunities or customers at a higher rate than similar accounts that didn't see your campaigns. If SDRs consistently report warmer conversations and higher connect-to-meeting ratios for retargeted leads, that's your signal it's working.
How often should prospects see my retargeting ads?
There's no universal magic number, but a good starting point is 3-5 impressions per user per week per network, with tighter caps for very small, high-value audiences. Platforms like LinkedIn and Google let you set these limits in campaign settings. Watch for signs of fatigue-declining CTR, rising cost per click, or negative feedback-and adjust frequency and creative rotation accordingly so you stay present without becoming noise.
What role should SDRs play in retargeting campaigns?
SDRs should be the human follow-up layer on top of your automated retargeting engine. When someone hits a key intent threshold-multiple high-intent page visits, ad engagement, content downloads-that should trigger a specific SDR play: a short sequence of calls, emails, and social touches referencing the exact asset or pain point. SDRs don't need to manage the ads themselves, but they should absolutely have visibility into retargeting engagement and be trained on how to use it in conversations.
Is retargeting worth the effort for smaller B2B teams?
Yes-arguably even more so. Smaller teams can't afford to burn through cold audiences, and retargeting helps you squeeze more value out of every click and visit you've already paid for. Because retargeted visitors are significantly more likely to convert and CPL can be up to 50% lower than other channels, even modest budgets can drive meaningful, sales-ready conversations if you're tightly focused on your ICP.worldmetrics.org
How do privacy regulations affect B2B retargeting?
Regulations like GDPR and CCPA mean you need clear consent, transparent privacy policies, and compliant data handling, especially when you're using cookies and uploading contact lists for matched-audience targeting. From a sales perspective, that means working closely with legal and marketing ops, minimizing the data you collect, and making sure you're only retargeting people who've engaged in ways that reasonably imply interest-like visiting your site or opting into content-rather than renting random lists or buying sketchy third-party data.