Under Brand mentions you will find different indicators regarding the relationship between the influencer's posts and brands.
One of them is Paid Post Engagement which measures engagement in case of a paid post and regular posts as well, so that you can easily compare.
Another indicator in this category is the Paid Post Frequency which monitors each and every post and evaluates whether it is an advertisement or not. Again, it compares this number with the frequency of regular posts.
The section of Top 5 Brands lists the brand names that were mentioned in the influencer's post the most.