Influencer marketing: what it is, how it works, and how to succeed

Influencer marketing is the strategy of promoting products, services, and brands through people who have relevance and trust with a specific audience: digital influencers.

Today, it’s no longer just about follower count. It revolves around two main points: micro and nano influencers, who deliver more engagement at a lower cost, and the use of artificial intelligence to select profiles, detect fake audiences, and measure results.

Brazil is the world’s second largest creator market, with 4.4 million active influencers on Instagram alone, according to HypeAuditor’s 2026 report. If you create content or want to promote a product, you can use this strategy without a big budget. We’ll explain how, from the concept to the return.

What is influencer marketing?

Influencer marketing is the use of a spokesperson with recommendation power to influence a purchase decision in favor of a brand. The influencer works as a bridge between the brand and the consumer: they’ve already built an audience and a relationship of trust, and the brand taps into that relationship to present the product in a way that feels closer than a traditional ad.

Don’t confuse it with regular advertising. The difference lies in trust: 69% of consumers trust an influencer’s recommendation more than an ad from the brand itself, according to data compiled in 2026 influencer marketing statistics. That’s why the strategy converts: the audience isn’t watching an ad, they’re listening to someone they trust.

Who are digital influencers, and what are their types by size?

A digital influencer is a person who creates their own content on social media, blogs, or video channels and, in doing so, gains authority and recommendation power within a niche. The most common classification separates influencers by follower count, known as their tier. Each tier follows a different logic in terms of reach and engagement.

Notice a relationship that seems counterintuitive: the bigger the tier, the lower the engagement tends to be. Nano-influencers with fewer than 5,000 followers reach as high as 5% engagement, while celebrities hover around 1.6%, according to HypeAuditor data gathered in the industry’s 2026 statistics.

For those just starting out, that’s good news: you don’t need a huge name to sell. A smaller profile well aligned with your product can deliver a better return.

Why invest in influencer marketing?

Influencer marketing has grown because it delivers measurable results, not just visibility. Here are the main reasons to include it in your strategy:

• Trust that turns into sales: a recommendation from someone close carries more weight than an ad. In Brazil, 7 out of 10 internet users follow influencers, according to a 2025 survey by Opinion Box and Influency.me.
• Segmented audience: the influencer has already gathered the right audience. You speak directly to people interested in your niche, without wasting budget on those who won’t buy.
• Affordable cost: negotiating with micro and nano influencers is cheaper and more direct. In 2026, a campaign with a micro-influencer can cost between $100 and $1,000, compared to over $10,000 for big names, according to a survey by Labra on campaign costs.
• Higher return than traditional media: well-planned campaigns tend to outperform the ROI of traditional paid media, because they build on an existing relationship of trust.
• Content you can reuse: the material created by the influencer feeds your social channels, your content marketing, and your paid campaigns.

How do you run an influencer marketing campaign?

An influencer marketing campaign follows seven steps, from setting the objective to measuring results. Follow this order to avoid skipping stages that usually shape the outcome.

1. Set your objectives: promote the brand, boost reach, launch a product, generate leads, or drive sales? The objective guides every decision that follows. Be specific and measurable, like generating 100 leads or increasing brand awareness by 20%.
2. Know your audience well: think about your persona and their habits: what content they consume and which influencers they follow. This shapes the next step.
3. Choose the right influencers: look for someone who speaks to an audience similar to yours and shares values close to your brand’s. Look at engagement, not just follower count.
4. Plan the actions together: align on what will be done with the influencer so the content reflects both their style and your brand’s. Work together, without leaving everything up to just one side.
5. Formalize the partnership: outline the terms: duration, formats, deadlines, and scope. The clearer the agreement, the lower the risk of misunderstandings.
6. Don’t limit creativity: give guidelines, but leave room for the influencer to create in the language their audience already knows. Too much control kills authenticity.
7. Track the results: compare what happened against the objectives from step 1: leads, sales, traffic, mentions. If the numbers don’t add up, adjust course.

How do you choose the right influencer?

The most important criterion for choosing an influencer is engagement rate, not follower count. A profile with 200,000 followers and low engagement delivers less than a profile with 20,000 and an active community. Evaluate four points before closing the deal:

• Audience fit: the influencer’s audience needs to relate to your product. A cooking profile selling kitchenware works; selling car parts, it doesn’t.
• Real engagement: look at comments, saves, and shares, not just likes. Sudden spikes in followers can signal bot purchases.
• Reputation and track record: research past campaigns and any potential controversies. The influencer’s image rubs off on your brand.
• Media kit: a professional influencer usually has a document with audience data and formats. Its absence is a warning sign.

Metrics and KPIs to measure results

Influencer marketing KPIs vary depending on the campaign’s objective. The table below summarizes what to measure at each stage of the funnel.

Today, the focus is on real interaction. Metrics like trackable link CTR, exclusive coupon usage, and genuine comments matter more than vanity numbers. To track sales, it’s worth creating coupons and UTM parameters for each influencer, so you know exactly where each conversion came from. In top-of-funnel campaigns, without direct sales, EMV (earned media value) helps estimate the media return.

What’s changing in influencer marketing right now: AI and micro-influencers

Influencer marketing has matured: it moved past the experimentation phase and became a performance channel measured by data. Two shifts explain this turn. The first is the strength of smaller profiles, and the second is the arrival of artificial intelligence at every stage, from choosing the influencer to measuring the result.

How has artificial intelligence changed selection and measurement?

Artificial intelligence now handles the work the human eye can’t keep up with: analyzing millions of profiles, identifying fake audiences, and predicting campaign performance before it even starts. In 2025, 83% of Instagram influencers were already using AI tools to create content, according to HypeAuditor, and adoption is heading toward near-universal. In practice, AI operates on three fronts:

• Profile discovery: cross-references niche, demographics, and history to suggest who truly speaks to your audience.
• Fraud detection: identifies fake followers and engagement before signing a contract, protecting your budget.
• Performance prediction: estimates ROI and cost per engagement based on past campaigns, making the decision safer.

Technology speeds up the process, but it doesn’t replace human judgment. Connecting with an audience still depends on authenticity, and that’s where your strategic choice makes the difference.

Why do micro and nano influencers dominate performance?

Smaller profiles have become the main driver of conversion. In 2025, 60% of posts tagged as ads on Instagram came from creators with fewer than 50,000 followers, according to HypeAuditor. The reason is the combination of a loyal community, high engagement, and affordable cost. For those just starting to promote a product, this is the path with the best return on investment: start small, close to your audience, and grow from what works.

Types of influencer partnerships

Influencer partnerships fall into two categories: paid media and organic media. The difference lies in whether or not there’s compensation involved.

• Paid media: the brand pays the influencer to promote the product. This is the model used for campaigns with mid-tier and large profiles, who charge a fee for the post.
• Organic or earned media: happens without a paid deal, when the influencer, or the customer themselves, promotes the brand spontaneously. User-generated content (UGC) is the most valuable form of this category, because it comes from someone who has already bought and trusts the product.

Common mistakes to avoid

Five mistakes bring down most campaigns. Knowing them in advance saves budget and prevents image crises.

• Choosing based on follower count and ignoring real engagement rate;
• Signing with profiles that have a questionable reputation or fake followers and engagement;
• Working with an influencer who doesn’t speak to your audience or your persona;
• Not disclosing the ad. Every sponsored post needs to be clearly identified as advertising, following each country’s advertising regulations;
• Hiding the promotional nature of a post is a lack of transparency and can damage the brand.

How to turn your audience into revenue with Hotmart

Influencer marketing works best when you have something to sell. If you’ve already built an audience, the next step is turning it into your own digital product, a course, an ebook, or a community, and using your influence to sell what’s yours, not just other brands’ products.

Hotmart, the all-in-one platform for creators, covers that entire journey, from creation to sale. And for those who prefer promoting other people’s products, the affiliate program pays commissions that can reach up to 80% per sale, with automatic management and payouts. It’s the natural bridge between influence and revenue: you bring the talent and the audience, we bring the tools to monetize it.

• How Hotmart works