Access in-depth reporting on your campaigns in the "Campaign Stats" tab. 
You can see the most important statistics like Price/Post, Engagement and Followers on the first tab, which lets you have an overall look at how well your campaign has perfored by presenting visualized metrics.
On the next tabs, Location, Age and Gender you can check geographic and demographic data about the audience your campaign reached.
By selecting Platform, you can check the campaigns performance on each social media platform separately.