Influencer: someone who moves purchase decisions, and why follower tiers do not define it

The size division is a market convention, not an official rule, and the boundaries vary between agencies. The most used version:

• Nano. Up to around ten thousand followers.
• Micro. Roughly ten thousand to one hundred thousand.
• Macro. One hundred thousand to a million.
• Mega or celebrity. Above a million.

The real use of that scale is budgetary: it gives brands a cost reference. What it does not do is measure influence, and confusing the two is the mistake that makes expensive campaigns return little.

Three concrete reasons.

Size and engagement run inverse. Smaller accounts usually have higher interaction rates, because the audience is closer and more specifically interested.

Generic audiences do not convert. A million followers with diffuse interests is worth less, for a specific product, than five thousand people in that product's exact niche.

Trust does not scale alongside. The more an account grows, the more advertising it does, and the more the audience discounts what it recommends.

Which is why campaigns with many small creators frequently outperform a campaign with one large one at the same budget.

It is the most searched question, and the honest answer is: there is no minimum.

What exists are practical requirements by type of work. Gifted collaborations and UGC depend on no audience at all, because in the second case the client buys the content rather than the distribution. Paid advertising with distribution usually starts happening in the nano tier, with a defined niche.

What brands actually look at before the number: whether the audience is their public, the engagement rate, whether there are fake followers, and whether the content history fits the brand.

An account of three thousand people in the right niche, with real engagement, is commercially more interesting than a diffuse fifty thousand.

Worth naming the obligations, because they tend to be discovered late.

• Disclosing advertising. Whenever there is compensation, including gifted product. The paid partnership label is the native way of doing it.
• Responsibility for what you recommend. In several countries, whoever promotes shares liability with the advertiser for misleading advertising.
• Formalisation. Being paid for promotion is professional activity revenue, with tax implications that vary by country.

Check the rules in your own country, because consumer protection bodies and advertising self regulation organisations hold their own positions on how disclosure must look.

• I know follower tiers measure size, not influence.
• My audience sits in a defined niche rather than being diffuse.
• I disclose advertising whenever there is compensation.
• I know my real engagement rate.
• I do not wait for a minimum number to start being paid.