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Key Influencer Marketing KPIs

Influencer marketing has become an essentialtool for brands and online stores. With the rise of social media, KOLs (KeyOpinion Leaders) have acquired considerable reach and influence, enabling themto shape the opinions and buying behaviors of their followers. By collaboratingwith relevant influencers, brands can reach specific target audiences, improvebrand awareness, and boost sales.


However, measuring the effectiveness of influencer marketing can be a challenge. Unlike traditional forms of advertising, influencer marketing isn't just about generating direct sales. It's also about building relationships, creating brand awareness, and engaging consumers. Consequently, influencer marketing KPIs need to go beyond traditional sales metrics.

In this article, we'll explore the key KPIs (Key Performance Indicators) you should be monitoring to gauge the success of your influencer marketing campaigns. These cover a range of areas, including engagement, reach, impressions, subscriber growth, conversion tracking, brand sentiment, content quality, cost per engagement (CPE), return on investment (ROI), audience demographics, long-term relationships, and KOL-specific metrics.

By monitoring these KPIs, you can get acomplete picture of the effectiveness of your influencer marketing campaigns and make informed decisions to optimize your future efforts.

KPIs and influencer campaigns : key takeaways

●      Engagement metrics, such as likes, comments and shares, are essential for assessing audience interaction with influencer content,

●      Reach and impressions give you an idea of the overall visibility of your content,

●      Tracking conversions and follower growth can help you understand the influencer's impact on your audience,

●      Brand sentiment analysis and content quality are important indicators of brand perception,

●      Influencer-specific metrics, such as authenticity and trust, are crucial to campaign success.

Influencer marketing: what are the objectives and how to measure them ?

Engagement Metrics and Key KPIs

Engagement is a key indicator of audience interest in your content. It can be measured in several ways:

-       Likes, comments, and shares: These interactions are direct signs that the audience is engaged. A large number of these interactions generally indicates that the content is well received by the audience,

-       Click-through rate (CTR): CTR measures the percentage of users who clicked on the influencer's content to visit your website or landing page. A high CTR indicates that the influencer's content has succeeded in arousing user interest.

Reach and impressions

Reach and impressions are two other important performance indicators to monitor:

-       Reach: Reach gives you an idea of the total number of unique users who have seen the influencer's content. It's an indicator of how far your message has spread,

-       Impressions: Impressions measure the total number of times your content has been viewed. This indicates the overall visibility of your publications.

Follower growth

Tracking the growth of an influencer's followers during the campaign period can help you assess the influencer's impact on his or her audience.

Significant follower growth can indicate that the influencer has succeeded in attracting new followers thanks to your campaign. This is a positive sign that your message is resonating with the influencer's audience.

Conversion tracking

Tracking conversions is crucial to understanding the effectiveness of your influencer campaign. Here are a few points to consider:

-       Conversion rate: This is the percentage of users who performed a desired action (for example, making a purchase) after interacting with the influencer's content. A high conversion rate indicates that the influencer's content is effectively motivating users to take action,

-       Attribution: It's important to determine the influencer's influence in the customer’s journey and attribute conversions accordingly. This will help you understand the influencer's real impact on conversions.

Brand sentiment and awareness

Brand sentiment and awareness are key to understanding how your brand is perceived and recognized:

-       Brand mentions: Track how many times your brand is mentioned in association with the influencer's content. This can give you an idea of your brand's visibility,

-       Sentiment analysis: Evaluate the sentiment of user comments and mentions to understand the overall perception of your brand. This can help you identify the strengths and weaknesses of your campaign.

Content quality

Content quality is a key factor in the success of your campaign:

-       Content relevance: Assess the alignment between the influencer's content and your brand message. Good alignment ensures that the influencer's content reinforces your brand message,

-       Content impressions: Measure how well the influencer's content resonates with your target audience. This can help you understand whether the content is engaging and relevant to your audience.

Cost per engagement (CPE) and Return on Investment (ROI)

Understanding CPE and ROI can help you assess the effectiveness of your investment:

-       CPE: Cost per engagement helps you understand how much you're spending on each form of engagement generated by influencer content. A low CPE indicates that you're getting a good return on your investment,

-       ROI: Evaluate the return on investment by comparing the campaign's earnings with the overall costs. A high ROI indicates that your campaign is profitable.

Earned Media Value (EMV)

EMV is the key KPI for influencer partnerships:

EMV (Earned Media Value) is a measure of the value your brand receives from organic (unpaid) media mentions. A high EMV indicates that your brand enjoys high visibility and a good reputation in the media. It's a key indicator of the success of your influencer campaign.

Audience demographics

Understanding the demographics and interests of the influencer's audience is essential to ensure alignment with your target market:

-       Demographic information: It's important to understand the demographics of the influencer's audience, such as age, gender, geographic location, and so on. This will help you determine whether the influencer's audience matches your target market,

-       Audience interests: Understanding the interests of the influencer's audience can help you align your brand message with what resonates best with the audience.

Long-term relationships, the study of influencer marketing

Assessing whether the content creator and audience are receptive to multiple collaborations can indicate the potential for long-term partnerships. This can benefit your brand by building a deeper, more meaningful relationship with the KOL's audience.

However, it's important to note that high erexpectations can push some KOLs out of the game. Nevertheless, changing attitudes also offer opportunities to those who are prepared to do things the right way. Major brands, in particular, will be offering qualitative contracts in the near future, providing influencers with a greater level of stability over the long term.

Justine Provent, PR and social media manager for luxury fashion and technology brand Fusalp, told Kolsquare:

"We only want to work with people who genuinely love our products, who love wearing Fusalp, and who are attached to the brand. We only want to work with them for the long term and have relationships that we build over time, to create a story, and give meaning to the relationship we have with our influencers."

This approach underscores the importance of authentic, long-term collaboration with KOLs, which can not only strengthen the relationship between brand and influencer, but also create a deeper, more meaningful connection with the KOL's audience.

Influencer-specific metrics

Evaluating the influencer's credibility and authenticity is crucial to the campaign's success:

-       Authenticity and trust: The influencer's authenticity and credibility are key factors for a campaign’s success. An authentic and credible influencer is more likely to engage  his or her audience and generate positive results for your campaign,

-       Influencer's personal performance indicators: Understanding and aligning with the influencer's own performance metrics and goals can help ensure a successful collaboration. This can include goals such as increasing engagement, increasing reach, etc. By aligning your objectives with those of the influencer, you can work together to achieve mutually beneficial results.

What KPIs can be used to ensure that the influencer's community is real and engaged?

Assess influencer compliance with Kolsquare's Compliance Score

Kolsquare has launched the "Compliance Score", an innovation enabling brands to assess the compliance of Key Opinion Leaders (KOLs) with French influencer marketing legislation. This feature provides a quick overview of how KOLs identify their sponsored publications and comply with standards for sensitive content. It is already available to French KOLs with over 5,000 followers on Instagram and will be extended to other European markets, such as the UK and Germany.

The "Compliance Score" evaluates publications over the last three months and ranks KOLs from "Very Good" to "Very Bad" according to their compliance with legal requirements. This measure comes after the adoption of laws in France making brands co-responsible for illegal content shared by influencers. Influencers must clearly mark promotional content and are prohibited from promoting certain products, like  cosmetic surgery or gambling.

For marketers, the Compliance Score simplifies the influencer selection process and ensures that influencers are in line with brand values and legal obligations. Kolsquare has also developed a filter to identify ARPP-certified influencers for responsible influence.

Kolsquare's algorithm analyzes brand mentions and determines whether a publication is a collaboration; it then assigns a score according to the accuracy of the labeling in compliance with French law. While France is ahead of the game with laws specific to influencer marketing, other countries rely on existing advertising regulations, with national self-regulatory authorities drawing up guidelines to enhance transparency in the sector.

The Kolsquare Credibility Score for dealing with Fake Followers

For all influencers in the global database, Kolsquare technology calculates a percentage that indexes the credibility ofeach influencer. Kolsquare's credibility score shows how "healthy" an influencer's audience is. The software checks profiles for bots, inactive followers, purchased likes, and purchased followers. A score between zero and 100 is then determined.


The influencer marketing landscape continues to evolve, offering brands unique opportunities to connect with their audience in meaningful and measurable ways. Influencer marketing KPIs, from engagement to reach to conversions and beyond, provide a roadmap for navigating this complex field.

By implementing rigorous monitoring of these indicators, brands can not only measure the effectiveness of their campaigns, but also optimize them for maximum impact. Authenticity, trust, and long-term collaboration with influencers remain at the heart of this success.

Brands that invest in understanding andapplying relevant KPIs will be better placed to forge lasting bonds with the iraudiences, boosting awareness and driving sales.

In the digital age, where data reigns supreme, arming yourself with the right influencer marketing KPIs is not only strategic but essential to navigating the road to success.

About Kolsquare

Kolsquare is Europe’s leading Influencer Marketing platform, a data-driven solution that allows brands to scale their KOL Marketing strategies and implement authentic partnerships with KOLs (Key Opinion Leaders). Kolsquare’s technology enables marketing professionals to easily identify the best Content Creators profiles by filtering their content and audience, and to build and manage their campaigns from A to Z, including measuring results and benchmarking performance against competitors. Kolsquare has built the largest community of influencer marketing experts in the world, and offers hundreds of customers (Coca-Cola, Netflix, Sony Music, Publicis, Sézane, Sephora, El Corte Inglés, Lacoste, …) the latest Big Data, AI and Machine Learning technologies to drive inspiring partnerships, tapping into an exhaustive network covering 100% of  KOLs with more than 5,000 followers in 180 countries on Instagram, TikTok, Twitter, Facebook and YouTube. As a Benefit Company, Kolsquare has been pioneering Responsible Influence by championing transparency, ethical practices, and meaningful collaborations to inspire change.

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