What Is Influencer Marketing? A Complete Guide for 2027

Cover: What Is Influencer Marketing? 2027 Guide

Influencer marketing is a form of marketing where a brand pays or otherwise compensates people with an engaged audience – creators, influencers or well-known personalities – to present its product, service or message in their own channels and in their own voice. It works because people trust recommendations from someone they already follow more than they trust a traditional ad, which lets a brand borrow that trust and reach an audience that would otherwise scroll past.

Influencer marketing is no longer a side experiment. According to the IAB, US creator economy ad spend was projected to reach 37 billion dollars in 2025, up 26 percent year over year. In Sweden, 43 percent of the population follows influencers, and among 15–24-year-olds the share is 79 percent, according to Mediemyndigheten.

What is influencer marketing, in simple terms?

In simple terms, influencer marketing is word of mouth at scale. Instead of the brand speaking, a person the audience already knows does the talking – a niche creator, a full-time content creator or a celebrity from TV, music, sport or podcasts.

What separates influencer marketing from a regular ad is that the content is shaped by the influencer. The brand sets the goal, the key messages and the boundaries, but the influencer decides how to say it so that it fits their style and audience.

How does influencer marketing work?

Most campaigns follow the same basic steps:

Goal: decide what the campaign should achieve – awareness, consideration, traffic, sales or content for other channels.
Audience and selection: choose influencers whose followers match the target group in age, interests and location, and whose values fit the brand.
Brief and agreement: describe the message, deliverables, timeline, approvals, usage rights and labelling in a brief and a written contract.
Content and publishing: the influencer creates the content, the brand reviews it, and it is published with clear ad labelling.
Amplification: the best content is often boosted with paid media or reused in the brand’s own ads, newsletters and website.
Measurement: results are tracked against the goal and the learnings feed into the next campaign.

Selection is where many campaigns are won or lost: in the IAB’s 2025 research, buyers named creator reputation (58 percent) and audience alignment (56 percent) as their top criteria – ahead of follower count.

What types of influencers are there?

Influencers are usually grouped by audience size. There is no official standard, and the thresholds below are a common rule of thumb rather than fixed limits:

Nano-influencers: roughly 1,000 to 10,000 followers. Close-knit communities, often high engagement and local or niche credibility.
Micro-influencers: roughly 10,000 to 100,000 followers. Recognised voices within a niche such as food, fitness, interiors or parenting.
Macro-influencers: roughly 100,000 to one million followers. Established creators who often run their channels like small media companies.
Celebrities: people known beyond social media – from TV, music, sport or podcasts – whose recognition reaches people who do not follow them.

Follower counts should be read with care on a small market like Sweden, and many strong campaigns combine levels. We go deeper in our guide to micro, nano and celebrity influencers.

Which formats and platforms are used?

Influencer marketing happens wherever people follow other people: mainly Instagram, TikTok, YouTube and Snapchat for Nordic brands, plus podcasts and LinkedIn for B2B. Younger audiences are easiest to reach on TikTok and Snapchat, broader adult audiences on Instagram, Facebook and YouTube.

Common formats include sponsored posts and short-form video, stories with links and discount codes, long-form video and podcast segments, live streams and events, gifting and seeding, long-term ambassador agreements, and creator content reused in the brand’s own paid ads.

Why does influencer marketing work?

The short answer is trust. According to Nielsen’s Trust in Advertising study, 88 percent of global respondents trust recommendations from people they know more than any other channel. An influencer is not a friend, but regular followers often feel that they know the person, and a recommendation from them borrows some of that personal trust.

A familiar face also stops the scroll, shows the product in real life and knows the platform better than most brands do. Celebrities add recognition and a long public history that newer creators rarely have.

We see this in our own work at Collabri. In Coca-Cola Loves Tacos, well-known duos such as Pernilla Wahlgren and Sofia Wistam and Carolina Gynning and Carina Berg reached over 4.5 million views and 6,300 interactions. When Ellos brought Carolina Gynning and Carina Berg to Tough Viking, the content passed 756,000 views.

What does influencer marketing cost?

There is no standard price list. Costs range from free products for a nano-influencer to substantial fees for a well-known personality. The main cost drivers are:

Reach and recognition: larger audiences and well-known names cost more per collaboration.
Deliverables: the number of posts, formats and platforms, and how much production each requires.
Usage rights: the right to reuse content in the brand’s own ads or channels, and for how long.
Exclusivity: agreeing that the influencer will not work with competitors for a period.
Timing and duration: a single post costs less than a long-term ambassador agreement, but usually builds less.
Paid amplification and management: media budget for boosting posts, plus planning, contracts, approvals and reporting.

Budgets are growing. In Influencer Marketing Hub’s latest Benchmark Report, 87 percent of respondents expect their influencer marketing budget to increase. See also our guide to influencer marketing budgets.

How do you measure influencer marketing?

Measurement starts with the goal: reach, views and brand lift for awareness; comments, shares and saves for engagement; clicks, discount codes, affiliate links and conversions for sales. In Influencer Marketing Hub’s report, 89 percent of respondents in the groups increasing their budgets select brand awareness as a KPI, while only 25 percent select attributable revenue or sales.

Results can be strong. In CreatorIQ’s latest State of Creator Marketing report, 48 percent of brands report a return of three times their investment or more, up from 37 percent the year before, and 77 percent say they are confident in measuring the business impact. Even so, no single method dominates, so agree on KPIs, tracking and reporting before the campaign starts.

What are the rules for influencer marketing in Sweden?

In Sweden, influencer marketing is covered by the Marketing Act (marknadsföringslagen), and hidden advertising is prohibited. According to Konsumentverket, the Swedish Consumer Agency, the wording, placement and colour of the labelling must make it clear at first glance that a post is paid, and the agency recommends the word “reklam” (advertising). This applies whether payment is money, products or services.

Responsibility is shared. The company that hired the influencer has the main responsibility, even for content made without specific instructions, while influencers and intermediaries such as agencies can have parallel responsibility. In its latest report, Konsumentverket concluded that influencer marketing is still highly problematic as a business method: the law is only partly followed and knowledge of the rules is often low. Read more in our guide to influencer advertising rules in Sweden.

What changes in influencer marketing toward 2027?

AI content must be disclosed. The transparency rules of the EU AI Act have applied since 2 August this year, with the last technical requirements following on 2 February 2027. If AI is used to create or alter a person’s image or voice, disclose it on top of the normal ad labelling.
New EU rules are on the way. The European Commission has announced a Digital Fairness Act, expected to cover influencer marketing and hidden advertising.
Creator content moves into paid media. More brands boost creator posts and reuse them in their own ads, which makes usage rights part of every agreement.
Measurement becomes a requirement: 65.9 percent of respondents in Influencer Marketing Hub’s report expect influencer activity to pay back within one month.

Glossary: key influencer marketing terms

Creator

A person who makes content for social media. Often used interchangeably with influencer, but it puts the emphasis on the content rather than the audience.

Engagement rate

The share of an audience that interacts with a post through likes, comments, shares or saves, usually measured against followers or reach.

Usage rights

The brand’s right to reuse an influencer’s content in its own channels or ads, for a defined period and in defined markets.

Whitelisting

When a brand runs paid ads through an influencer’s account or with their content, so the ad appears to come from the influencer.

Seeding

Sending products to influencers without a paid agreement, hoping they will share them. If anything is expected in return, labelling rules may still apply.

Brand ambassador

An influencer or celebrity who represents a brand over a longer period, often with exclusivity and several campaigns.

Ad labelling

The clear marking that a post is advertising, required by Swedish marketing law. In Sweden, the word “reklam” is the recommended label.

An example from our own work: Collabri’s campaign for Coca-Cola reached 4.5 million views and 6,300 interactions. You’ll find more examples among our client projects.

Key takeaways

Influencer marketing means compensating people with an engaged audience to present a brand in their own channels and voice.
It works because of trust: 88 percent trust recommendations from people they know more than any other channel.
Nano-, micro-, macro-influencers and celebrities each play different roles – many campaigns combine them.
Cost depends on reach, deliverables, usage rights, exclusivity and paid amplification.
In Sweden, every collaboration must be clearly labelled as advertising, and the brand carries the main responsibility.
Toward 2027, prepare for AI disclosure, new EU rules and higher demands on measurement.

Frequently asked questions

What is influencer marketing?

Influencer marketing is when a brand works with creators, influencers or celebrities to present its product or message in their own channels and voice, with the brand setting the goal and the boundaries.

Is influencer marketing the same as social media marketing?

No. Social media marketing covers everything a brand does on social platforms, including its own accounts and ads. Influencer marketing is the part carried by other people’s channels and credibility.

Do small brands need big influencers?

Not necessarily. Nano- and micro-influencers often deliver strong engagement and niche credibility at a lower cost. Well-known names make most sense when many people need to notice something quickly.

How should influencer posts be labelled in Sweden?

It must be clear at first glance that the post is advertising. Konsumentverket recommends the word “reklam”, and the rules apply even when the influencer is paid in products or services.

Want to know how influencer marketing could work for your brand? Contact Collabri at info@collabri.se. We are a full-service talent and influencer marketing agency in Stockholm, founded in 2023 and working across Sweden and Norway. You can also browse our talents and client projects.

Sources

IAB – Creator Economy Ad Spend to Reach $37 Billion in 2025, Growing 4x Faster than Total Media Industry (2025): https://www.iab.com/news/creator-economy-ad-spend-to-reach-37-billion-in-2025-growing-4x-faster-than-total-media-industry-according-to-iab/
Mediemyndigheten – Influencers på den svenska mediemarknaden (2026): https://mediemyndigheten.se/rapporter-och-analyser/influencers-pa-den-svenska-mediemarknaden/
Nielsen – Beyond martech: building trust with consumers and engaging where sentiment is high (2021): https://www.nielsen.com/insights/2021/beyond-martech-building-trust-with-consumers-and-engaging-where-sentiment-is-high/
Influencer Marketing Hub – Influencer Marketing Benchmark Report 2026 (2026): https://influencermarketinghub.com/influencer-marketing-benchmark-report/
CreatorIQ – State of Creator Marketing 2026–2027 (2026): https://www.creatoriq.com/white-papers/state-of-creator-marketing-trends-2027
Konsumentverket – Influencers reklaminlägg – regler för företag: https://www.konsumentverket.se/marknadsratt-foretag/influencers-reklaminlagg-regler-for-foretag/
Konsumentverket – Fortsatt stora brister i marknadsföring som sker genom influencers (2026): https://www.konsumentverket.se/nyhet/fortsatt-stora-brister-i-marknadsforing-som-sker-genom-influencers/
Paul, Weiss – EU Finalises Transparency Rules for AI-Generated Content (2026): https://www.paulweiss.com/insights/client-memos/eu-finalises-transparency-rules-for-ai-generated-content
European Parliament – Legislative Train: Digital Fairness Act: https://www.europarl.europa.eu/legislative-train/theme-protecting-our-democracy-upholding-our-values/file-digital-fairness-act

This article was written with the help of AI and reviewed by Collabri.