Influencer marketing has become a core advertising channel. US spending is expected to grow 15.7% in 2026 and reach $13.7 billion by 2027, EMARKETER forecasts. The channel delivers results: 58% of consumers over 18 have purchased products because of an influencer endorsement, according to the National Advertising Division of BBB National Programs. Yet challenges persist around trust and measurement. 26% of consumers distrust influencer marketing, well above the 11% who distrust advertising overall. This FAQ addresses how marketers can work with influencers while proving ROI and maintaining consumer trust.

What is influencer marketing?

Influencer marketing involves partnering with individuals who have established audiences on social media platforms to promote products or services. Unlike traditional celebrity endorsements, influencer marketing relies on digitally-native creators who have built trust with specific communities through consistent, user-generated content.

The practice operates across Instagram, TikTok, YouTube, and increasingly LinkedIn and podcasts. Marketers use influencer marketing to support business goals including brand awareness (66%) and revenue growth (55%), according to Sprout Social. Brands compensate influencers through flat fees, performance-based payments, product gifting, or hybrid models.

What is an influencer?

An influencer is an individual who can affect the purchasing decisions of their followers through their authority, knowledge, or relationship with that audience. The term encompasses those with millions of followers to niche content creators with a few thousand engaged fans.

Influencers differentiate from traditional celebrities through their direct, ongoing relationship with audiences. They create content consistently, respond to comments, and build community around specific interests. This accessibility creates perceived authenticity that brands leverage for marketing. 92% of consumers trust recommendations from individuals like friends and family over brands, per Nielsen, and successful influencers are often perceived as peers rather than advertisers.

What are the different types of influencers?

Influencers are categorized by follower count, which correlates with reach, engagement rates, and cost:

• Mega-influencers (1M+ followers). Influencers who offer massive reach, but come with high costs and often lower engagement rates.
• Macro-influencers (100K-1M followers) and Mid-tier influencers (up to 500K followers). Established creators with broad reach and professional content quality.
• Micro-influencers (up to 50K followers). Niche-focused creators with strong community relationships and higher engagement rates.
• Nano-influencers (up to 10K followers). Everyday consumers with small but highly engaged audiences. Nano-influencers on TikTok average 10.3% engagement rates, per Influencer Marketing Hub, while Instagram nano-influencers average 6.23%, according to data shared exclusively with EMARKETER by KPI partner Captiv8.

What challenges are holding influencer marketing back?

Influencer content commands attention. The average skip time for ads with influencer content is 17.8 seconds, compared with 7.9 seconds for traditional branded content, per Kantar. Marketers see opportunity, but proven performance remains a challenge. 54.7% of US brand marketers and agencies say proven higher ROI compared with other channels would be the top factor warranting increased creator marketing budgets, according to an EMARKETER and Spotter survey.

Which platforms do marketers use for influencer marketing?

Marketers deploy influencer campaigns across platforms based on audience demographics and content format needs:

• Instagram remains the dominant platform for influencer partnerships, with strong performance in fashion, beauty, travel, and lifestyle categories. Nano-influencers represent 75.9% of Instagram influencers, per HypeAuditor.
• TikTok leads for reaching younger audiences and driving viral discovery. Nano-influencers represent 87.7% of all influencers on the platform and deliver the highest engagement rates.
• YouTube serves long-form content needs. These partnerships can come with higher production costs, but longer content shelf life.
• LinkedIn has emerged for B2B influencer marketing, with executives and industry experts building professional audiences.
• Podcasts offer audio sponsorship opportunities with highly engaged, niche audiences.

How do marketers measure influencer marketing performance?

The industry lacks a gold standard for how influencer marketing should be measured. Marketers often use their own combination of key metrics, which include:

• Engagement rates. Likes, comments, shares, and saves indicate content resonance. Engagement rate normalizes across audience sizes.
• Reach and impressions. Total audience exposed to content, though platform-reported figures vary in methodology.
• Conversion tracking. Unique discount codes, affiliate links, and UTM parameters attribute sales to specific creators.
• Attention metrics. Influencer ads maintain 1.4 times higher visibility duration than traditional content, per Kantar.
• Brand lift studies. Surveys measuring awareness, consideration, and purchase intent changes among exposed audiences.

What are the risks of influencer marketing?

Influencer marketing carries distinct risks requiring active management:

• Trust deficits. 26% of consumers distrust influencer marketing, compared with 11% for advertising overall, per NAD/BBB National Programs.
• Disclosure failures. 64% of consumers distrust influencers who don't disclose their relationship with brands, and 70% feel negatively toward influencers after discovering undisclosed payments, according to the NAD/BBB report.
• Inadequate vetting. Over 50% of marketers spend only 30 minutes or less vetting a single influencer, and only 25.6% consistently receive documentation on influencer vetting, per EMARKETER and Viral Nation.

How can marketers avoid these pitfalls?

1. Find actual brand advocates. Partner with influencers who use and stand by your product.
2. Evaluate engagement quality. Review the comment section and conversation patterns. Higher engagement rates correlate with purchase likelihood.
3. Consider smaller creators. Nano-influencers deliver significantly higher engagement rates than mega-influencers and are often seen as peers rather than advertisers.
4. Require disclosure compliance. Ensure influencers clearly disclose brand relationships to maintain audience trust.
5. Formalize vetting procedures. Maintain detailed brand guidelines and thorough vetting documentation to mitigate brand safety risks.

We prepared this article with the assistance of generative AI tools and stand behind its accuracy, quality, and originality.

EMARKETER forecast data was current at publication and may have changed. EMARKETER Pro+ clients have access to up-to-date forecast data. To explore EMARKETER solutions, click here.