The overview insight gives you a glimpse of your Pinterest account KPIs, including followers, boards, Pins, and engagement metrics like repins, likes, and comments. You can see these as trending line graphs so that you can monitor your Pinterest account performance.
If your follower count grew week over week, you might want to dig into your Pinterest Best Performing Pins insight to see if there was one or more Pins that got a lot of engagement. Then publish similar content!
If you see a drop week over week or stagnation in your reach, you might want to check your Pins to see if engagement is low. If the content isn't engaging to your fans you might consider avoiding this content type.