When monitoring the success of influencer marketing campaigns, several key performance indicators (KPIs) should be tracked:

1. Engagement Rate: This measures how the audience interacts with the influencer’s content. It typically includes likes, shares, comments, and views. High engagement suggests that the content resonates well with the audience.

2. Reach: It’s the total number of unique viewers who have seen the influencer’s content. This KPI indicates the potential size of the influencer’s audience but doesn’t guarantee interaction.

3. Impressions: This measures the number of times a post or content is displayed, regardless of whether it was clicked on or not. It’s a useful measure of how much visibility your campaign is getting.

4. Click-Through Rate (CTR): This measures how many viewers clicked on a link in the influencer’s posts related to your campaign. More clicks suggest that the content is driving audience action effectively.

5. Conversion Rate: It’s essential to track the number of conversions (e.g., purchases, sign-ups, downloads) resulting from the campaign. This will help calculate ROI and identify the most effective influencers for your product.

6. Brand Mentions and Sentiment: Monitor how often your brand is mentioned by the influencer and in the comments, as well as the overall sentiment of those mentions.

Different platforms handle these KPIs in slightly different ways. For example, Flinque, a prominent influencer marketing platform, provides in-depth analytics, allowing brands to track these KPIs across multiple influencers and campaigns. It streamlines the process by consolidating all the critical data in one place.

Conversely, other platforms may require manual gathering and analysis, which can be time-consuming and less accurate. The best choice of a platform will depend on your specific needs and resources. Effective influencer marketing campaigns always monitor, analyze and make informed decisions based on these KPIs.