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How to measure influencer marketing success

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Influencer marketing entails leveraging endorsements and product mentions from influencers, who possess a dedicated social following and are revered as niche experts. These influencers wield influence over their audience through their authenticity, expertise, or charismatic persona. Businesses capitalize on this influence to expand their reach and effectively convey their brand narrative. The undeniable appeal of influencer marketing lies in its remarkable ability to generate high levels of audience engagement and directly impact consumer behavior. Consequently, it has become an indispensable component of numerous companies’ marketing strategies, enabling them to forge strong connections with their target audience and drive tangible results.

Measuring the success of influencer marketing campaigns is crucial for several reasons. Firstly, it validates the investment made into the campaign, demonstrating the effectiveness of influencer marketing as a viable marketing strategy. Secondly, tracking campaign performance allows businesses to understand which aspects of the campaign work best, which influencers deliver the highest returns, and which audiences are most responsive. These insights can guide future marketing efforts and strategic decisions, helping businesses optimize their campaigns for even better results.

Lastly, measuring the success of influencer marketing campaigns is important because it demonstrates the value of these campaigns in concrete, quantifiable terms. This makes it easier to justify future investments in influencer marketing, demonstrating its value to stakeholders who may not be as familiar with this form of marketing.

In this rapidly growing and evolving industry, understanding how to measure influencer marketing success is not just beneficial – it’s essential.


Key Performance Indicators (KPIs) are quantifiable measurements used to gauge the performance and success of a specific activity or campaign. In the context of influencer marketing, KPIs play a significant role in understanding the impact and effectiveness of the campaign. Various KPIs can be used, each offering a different perspective on how the campaign is performing.

One of the primary KPIs for influencer marketing is reach. Reach is a metric that shows how far your brand message has traveled and how many potential buyers it has reached. To calculate influencer reach, you need to consider the influencer’s follower count, the number of impressions your sponsored post receives, and the amount of traffic directed to your website via the influencer’s profile or account.

Engagement is another crucial KPI in influencer marketing. It encapsulates various metrics, such as likes, comments, shares, brand mentions, and the number of saved posts. The engagement rate, often calculated as cost per engagement (CPE), is a direct measure of how your audience interacts with the content.

Before launching an influencer marketing campaign, it’s critical to establish clear goals for what you want to achieve. These goals could range from enhancing brand awareness, increasing website traffic, to driving sales.

Aligning these goals with the right KPIs is paramount to accurately measure success. For instance, if your goal is to boost brand awareness, reach and impressions would be the most relevant KPIs. On the other hand, if you’re aiming to increase engagement or foster a more robust relationship with your audience, metrics like comments, shares, and likes would be more appropriate.

Setting clear goals and picking the correct KPIs enables you to focus on the results that matter most to your business, helping you optimize your influencer marketing campaigns to drive the highest return on investment. This strategic alignment of goals and KPIs paves the way to realizing the full potential of your influencer marketing efforts.


Reach in influencer marketing refers to the total number of unique individuals who have viewed your sponsored content via an influencer. It indicates the potential scale of your brand’s exposure and is a fundamental metric in assessing the initial impact of your campaign.

In the digital world where content overflows, reach is a significant component in any influencer marketing strategy. It directly corresponds to how far your brand message has traveled, essentially providing you with the breadth of your campaign’s audience. The larger the reach, the more prospective buyers have been introduced to your brand via the influencer, enhancing brand awareness and recognition.


  • Influencer follower count. This is the most straightforward metric to consider when estimating reach. The number of followers an influencer has can give you a rough idea of how many people will potentially see your sponsored post. However, this is a crude measure as not all followers will see every post due to various factors such as social media algorithms and follower activity.
  • Post impressions. This metric signifies the total number of times your sponsored content was displayed on users’ screens. It’s a more reliable indicator than follower count as it accounts for multiple views by the same user, thus providing a more accurate estimation of the content’s visibility.
  • Traffic data to your website. This data shows the exact amount of traffic driven to your website from the influencer’s post. It’s measured by tracking the number of users who click on the link shared by the influencer, indicating a high level of engagement and interest in your brand.

While measuring reach is vital, it’s important to remember that it’s not the sole determinant of a campaign’s success. A large reach doesn’t necessarily equate to a high level of engagement or conversions.

Furthermore, consider the potential for inflated reach. Some influencers may have fake or inactive followers, which can inflate their follower count without contributing to actual reach. Thus, while reach is a useful initial indicator of campaign potential, it should be corroborated with other metrics, such as engagement rates and conversion rates, to derive a holistic view of the campaign’s effectiveness.


While reach provides a snapshot of the potential audience size, engagement delves deeper into how this audience interacts with your brand message. Engagement metrics in influencer marketing track the level of interaction between users and your sponsored content. They act as reliable indicators of your audience’s interest level and responsiveness to your brand. High engagement typically implies that your content resonates with the audience, driving a deeper connection and ultimately nudging them further down the conversion funnel.


  • Clicks. The number of times users have clicked on the links in your sponsored content, such as a link to your website or a product page.
  • Likes. This basic form of engagement indicates the number of users who have positively responded to your content.
  • Comments. When users leave comments, they’re showing a higher level of engagement, often indicative of strong feelings or opinions about your content or products.
  • Shares. Shares amplify your content’s reach by spreading it across different networks. It is a strong indicator of approval and endorsement from the audience.
  • Reactions. Reactions, especially on platforms like Facebook, allow users to express a range of responses to your content, from “liking” to “loving” to expressing surprise or sadness.
  • Brand mentions. These occur when users explicitly mention your brand in their posts or comments, signaling a high level of awareness and engagement.
  • Saved posts. On platforms like Instagram, the number of saved posts shows how many users found your content valuable enough to revisit.


Cost per Engagement (CPE) is a crucial metric that allows you to assess the financial efficiency of your influencer marketing campaign. It is calculated by dividing your total ad spend by the total number of engagements. A lower CPE indicates a higher return on investment.

Consider an influencer marketing campaign where you’ve spent $4,000. The influencer has posted four posts that collectively generated 15,000 likes, 4,000 comments, and 1,000 shares, totalling 20,000 engagements. To find the CPE, you would divide the total ad spend ($4,000) by the total engagements (20,000), which yields a CPE of $0.2. This means, on average, each engagement cost you 20 cents.


Platforms like BuzzGuru significantly simplify the process of measuring engagement in your influencer marketing campaigns. You can use this tool to obtain a comprehensive overview of your sponsored content’s performance.

By simply entering the URL of your sponsored blog post or social media post into BuzzGuru, you can quickly access key engagement metrics, such as reactions, likes, comments, and shares. BuzzGuru also provides insights into influencers’ follower counts and average engagement rate, helping you understand your potential reach better.

Instagram engagerment rate benchmarks




An example of using a promo code on Instagram

For a more granular insight into the performance of your influencer marketing campaign, the use of coupon codes, affiliate links, and UTM parameters is highly recommended. These tools enable you to track individual transactions linked to specific influencers, offering a clear picture of who drives the most conversions for your brand.

Coupon codes and affiliate links offer the added benefit of incentivizing potential customers, while UTM parameters provide the necessary data to track these conversions back to the source – the influencer who shared your brand message.

After setting up your UTM parameters, you can track the performance of your campaign through Google Analytics or on platforms like BuzzGuru which, too, provide detailed data.


Return on Investment (ROI) is a critical measure used to evaluate the effectiveness and profitability of investments, and in the context of influencer marketing, it refers to the returns received from the costs spent on influencer campaigns. This could include sales revenues, audience growth, and brand awareness.

Determining ROI is crucial for assessing the effectiveness of an influencer marketing campaign. It provides an objective measure to evaluate the performance and profitability of your influencer marketing strategy. More importantly, understanding ROI can help you optimize your future campaigns, allocate your marketing budget more effectively, and make informed decisions about which influencers to collaborate with.


Calculating ROI for an influencer marketing campaign involves two key components: tracking costs and determining the value of outcomes. Costs can include payments to influencers, production expenses, and any associated marketing costs. The outcomes, on the other hand, can be direct (like sales) or indirect (like brand awareness or audience growth).

Direct ROI can be calculated by dividing the profit generated from the influencer campaign by the total cost of the campaign and then multiplying by 100 to get a percentage. For instance, if you invested $1000 in a campaign and it generated $5000 in sales, your direct ROI would be 400%.

Indirect ROI, although harder to quantify, is just as important. This can include metrics such as increased followers, improved brand recognition, or a surge in website traffic. These factors can be measured using analytics tools and assigned a monetary value based on your business goals.

ROI data provides valuable insights into the performance of your influencer campaigns and can be used to refine your future strategies. A high ROI indicates a successful campaign, while a low ROI may suggest the need to reassess your influencer partnerships, campaign strategies, or even the suitability of influencer marketing for your brand.

Here’s an example. Consider a scenario where you collaborate with an influencer for a campaign costing $2000. The campaign generates $10,000 in direct sales, resulting in a direct ROI of 400%. Meanwhile, you also notice a 20% increase in website traffic, a growth of 1000 new followers, and significant improvements in brand recognition. Assigning monetary values to these outcomes and adding them to the direct sales will provide a more comprehensive ROI, reflecting both the direct and indirect benefits of the campaign.

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Now you know the importance of influencer marketing, the need to align campaign goals with KPIs, and various techniques for measuring reach, engagement, and ROI. Understanding and applying these principles will help you effectively gauge the success of your influencer marketing campaigns. As this digital marketing landscape continues to evolve, your ability to measure and adapt will be crucial to your success.

To get even more info on how to evaluate your influencer marketing effectiveness, read more on the topic: 

To get your influencer marketing measured right, contact the Famesters influencer marketing agency and review Famesters on DesignRush. We can consult you or take all the necessary steps to prepare and run campaigns for you, and, of course, measure their success.


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