What is an Influencer?
An influencer is a creator whose audience trusts their recommendations enough that brands partner with them to reach it. Influencers are usually grouped by audience size, from nano (under about 10,000 followers) to mega (over a million).
Updated · 3 min read
Why influencers matter to brands
People trust recommendations from people more than from brands. An influencer has already built an audience in a niche, such as fitness, parenting or B2B software, and that audience listens to them. Partnering lets a brand borrow that trust and reach an audience it would take years to build, and the content creators make can often be reused on the brand's own channels.
Influencer tiers
| Tier | Typical followers | Strengths |
|---|---|---|
| Nano | 1,000 to 10,000 | Close community, high engagement, affordable |
| Micro | 10,000 to 100,000 | Niche authority with meaningful reach |
| Mid-tier | 100,000 to 500,000 | A balance of reach and engagement |
| Macro | 500,000 to 1 million | Large reach, professional production |
| Mega | Over 1 million | Mass awareness, often celebrities |
These ranges are conventions, not standards, and agencies draw the lines differently.
How to measure a partnership
- Before: audience fit (location, age, interests), engagement rate and the quality of comments, not just follower count.
- During: reach, views and engagement on the sponsored content.
- After: clicks and sales from unique discount codes or UTM links, and the cost per result.
Rules and disclosure
Paid partnerships must be disclosed clearly. In the US, the FTC's Endorsement Guides require a clear, hard-to-miss disclosure such as “ad” or “sponsored”; the UK's ASA and many other regulators have similar rules. Instagram, Facebook, TikTok and YouTube offer built-in paid partnership labels, but the FTC has said a platform's tool may not be enough on its own.
A worked example
An eco cleaning brand works with five nano-influencers in home and sustainability niches instead of one macro creator. Each posts an honest review with a unique discount code. Two of the five drive most of the sales, so the brand extends those partnerships and, with permission, runs their videos as ads.
Common mistakes
- Choosing by follower count and ignoring audience fit.
- Scripting creators so tightly the content stops sounding like them.
- No tracking codes or links, so results can't be measured.
- Skipping disclosure, which risks regulatory action and the audience's trust.
Influencer FAQ
What is the difference between an influencer and a creator?
The terms overlap. “Creator” emphasizes making content; “influencer” emphasizes the audience's trust and buying influence. Many people are both.
How much do influencers charge?
Rates depend on platform, niche, audience size, engagement, usage rights and deliverables, so there's no reliable universal price list. Ask for rates and recent results, and compare cost per result rather than cost per post.
Are micro-influencers better than big influencers?
Often, for niche products and tight budgets, because their audiences are focused and engaged. Large creators suit mass-market awareness. Many brands combine several small creators rather than betting on one big name.