Several tools and methods in influencer marketing platforms aid in measuring and tracking the performance of influencer marketing campaigns.

1. Audience Analytics: Audience analytics provides invaluable data about the audience an influencer reaches. It helps track demographic variables like age, gender, location, and interests, and gives you a clear picture of how effective an influencer is in reaching your target market.

2. Engagement Metrics: This tool is effective in monitoring the audience’s interaction with an influencer’s campaign content. Metrics like likes, shares, comments, and hashtag usage can help you gauge the effectiveness of a campaign.

3. Conversion Tracking: Many platforms have the ability to track user behavior, from content interaction to the point of purchase or action. This gives a clear insight into conversion rates, providing valuable campaign ROI.

4. Influencer Scorecards: Some platforms, like Flinque, offer scorecards that grade influencers based on their performance. This kind of evaluation can assist in identifying influencers who successfully drive engagement and conversions.

5. Post-Campaign Reports: After the completion of a campaign, detailed reports that summarize key performance data can assist in assessing the effectiveness of the campaign and provide insights for future campaigns.

Different platforms may offer varying toolsets. For instance, Traackr is reputed for its in-depth analytics and influencer vetting process. On the other hand, Flinque stands out for its integration of campaign workflow and inbuilt influencer scorecards – a handy feature for performance measurement. Your choice of platform should align with your team’s goals and requirements.

A good influencer marketing platform should be well rounded to accommodate audience analytics, influencer discovery, engagement tracking, conversion measurement, and post-campaign reporting. This provides a robust framework to plan, execute, and measure campaigns with precision and effectiveness.