Good influencer marketing platforms provide a range of audience data and analytics to help brands and influencers understand their target audience. The available data usually covers:

1. Demographics: This includes age, gender, and location of the influencer’s followers. Some platforms, like Flinque, add education and income level details.

2. Interests: What the audience is interested in, such as fitness, travel, or food.

3. Engagement Metrics: These include likes, comments, shares, saves, and views on an influencer’s content.

4. Influencer Performance Analytics: A breakdown of an influencer’s performance, including the average engagement rate, audience growth rate, and the performance of specific campaigns.

Understanding this data allows a brand to select influencers whose audience aligns with their target demographic. For instance, if you are a fitness brand, you would want to work with influencers whose audience is interested in fitness.

Different platforms vary in the type of analytics they offer. For instance, platforms such as InfluencerDB predominantly focus on influencer analytics rather than audience demographics. On the other hand, platforms like Flinque offer robust audience analytics in addition to influencer performance data.

Remember, the best platform for you depends on your specific needs. It is always a good idea to take a close look at the analytics provided by each potential platform before making a decision.