What is influencer marketing? A plain-English guide.

Influencer marketing is a brand working with people whose audiences trust them, so the brand’s message reaches those audiences through someone they already listen to.

That’s the whole idea. Everything else, the casting, the contracts, the content and the reporting, exists to do that one thing well. Doing it well is rarer than the size of the industry suggests.

What is influencer marketing, in one sentence?

It’s endorsement by people with an audience, in exchange for something of value. That last part matters: a free product, a trip or an affiliate commission counts just as much as a fee. In India, both the Advertising Standards Council of India (ASCI) and the government’s endorsement guidelines call this a material connection. Once there is one, the post has to say so.

Why does it work at all?

Because people trust people more than they trust ads. A recommendation from someone you’ve watched for two years carries a weight no banner can buy. The influencer did the slow work of earning that trust, and the brand borrows a little of it.

Which is also why it fails. Borrowed trust is fragile. If the product doesn’t fit, or the post reads like someone else wrote it, the audience notices, and the influencer pays for it in their comments long after the brand has moved on.

How does influencer marketing actually work?

A good campaign runs in roughly this order:

• A goal. Reach a new audience, launch a product, change how people see you. One goal, agreed before anything else.
• Casting. Finding creators whose audiences already overlap with yours, and whose taste you’d be glad to be seen next to. We wrote a whole piece on how to choose the right creator.
• Terms. Deliverables, usage rights, exclusivity, approvals and payment, in writing.
• A brief. Direction, not dialogue. The creator knows their audience better than you do. Here’s how to brief a creator without flattening them.
• The content. Made by the creator, sometimes with production help.
• Disclosure and posting. Clearly labelled, on the platforms where the audience actually spends time.
• Amplification. Putting paid budget behind the posts that work, often as partnership ads that run from the creator’s own account.
• Measurement. Against the goal you set at the start, not whichever number looks best afterwards.

What kinds of influencers are there?

By size, the industry talks in tiers. The cut-offs are conventions rather than rules:

• Nano: under about 10,000 followers. Often the closest relationship with their audience.
• Micro: roughly 10,000 to 100,000. Usually the sweet spot for trust. More on why micro-influencers often win.
• Macro: roughly 100,000 to a million. Real reach, usually less intimacy.
• Mega and celebrity: a million and up. Fame and scale.

By type, the more useful split is why people follow them: experts they learn from, entertainers they relax with, communities they belong to. There are also virtual or AI influencers, computer-generated personas, which come with their own rules.

What is influencer marketing good for?

It’s at its best when trust is the bottleneck:

• Introducing a brand to people who have never heard of you, through someone they already believe.
• Products people want to see used before they buy: food, skincare, gadgets, fitness, travel.
• Launches, where you need several credible voices at once.
• Content. With the right usage rights, a creator’s video can do more work in your ads than anything you’d shoot yourself.

It’s at its worst as a patch: fixing a weak product, or buying a spike of attention to hit a monthly number. You’ll get the spike. You won’t get anything that lasts.

Influencer marketing vs creator marketing: what’s the difference?

Emphasis. Influencer marketing puts the weight on a person’s audience: the reach and the trust. Creator marketing puts it on the work itself, whether or not the person has a big following. User-generated content (UGC) creators, who make videos for brands to post on their own channels, sit at the creator end.

In practice the best programmes need both: someone the audience trusts, making something worth watching. We lead with creator marketing because the work is where most campaigns go wrong. But if you came here searching for influencer marketing, you’re in the right place.

Do influencers have to label paid posts?

Yes, almost everywhere. In India, ASCI’s influencer guidelines (in force since June 2021) and the Department of Consumer Affairs’ Endorsement Know-hows (January 2023) both require a clear disclosure whenever there’s a material connection with the brand. That means a label such as “Ad”, “Sponsored”, “Collaboration” or “Partnership” on the post itself. Not lost in a pile of hashtags, and not only in the bio. Platform tools such as Instagram’s “Paid partnership” label help. The United States and the UK have their own versions of the same rule.

Virtual influencers carry an extra duty: ASCI requires them to tell people they aren’t real. And since February 2026, India’s IT Rules require AI-generated content to be labelled as well.

What makes influencer marketing work?

Fit, freedom, and enough time to be believed.

Fit means the creator would plausibly use your product anyway. Freedom means they say it in their own words, because their words are what their audience trusts. Time means more than one post: an audience believes the third mention more than the first. Get those three right and most of the rest is logistics.

How do you get started?

• Write down the one job the campaign has to do.
• Start from your audience: who do they already listen to?
• Pick a few creators who fit, rather than many who don’t.
• Agree usage rights and disclosure before anyone films.
• Decide how you’ll measure success before you see any numbers.

Or talk to us. Casting for fit is most of what we do.