An influencer is someone who has the power to sway their audience's opinions and purchasing decisions through their personal brand. In list building, finding and targeting these individuals can have a significant impact on business growth and success. It is important to research potential influencers thoroughly and build genuine relationships with them in order to create successful partnerships and campaigns.

When it comes to influencers, there are different types that cater to various niches and audiences. Here are some of the most common types of influencers:

1. Nano influencers: These are people with a smaller social media following (usually between 1,000 to 5,000 followers), but they have high engagement rates with their audience. They’re often considered more relatable and trustworthy than bigger influencers.

2. Micro influencers: Similar to nano influencers, micro influencers also have a relatively small social media following (between 10,000 to 50,000 followers). However, they tend to be more established in their niche and have more sway with their audience.

3. Macro influencers: These are influencers with a large social media following (usually over 100,000 followers). They have the ability to reach a wide audience and can be very influential.

4. Celebrity influencers: As you might expect, these are people who are already famous, whether it’s in Hollywood, the music industry, or elsewhere. They can have a huge impact on their fans and can be very powerful when it comes to marketing.