Studio API allows you to get aggregated data with detailed statistics of all your models for any period of time you select. You will get information on the type of earning and the amount of tokens received for the indicated type of earning. API is just an additional tool and it's up to you whether you want to use it or not; so if you don't know how to use it, simply disregard it.

To implement Studio API, head over to your dropdown menu, select "Studio API", and there you will find the key and API documentation you need.