Hello,
UPDATE: this feature is now available for all users 
We’ve been working on a new feature which we’ve called “Improve Your Shop”. This feature is now live to Plus sellers and we’ll be rolling it out to all users later this week.
You can find the feature from your Stats page.
The feature provides information on how you can improve both the shop and items in your shop. We intend to build on this feature with more useful, actionable information to help you make sales.