Google stores all the information regarding the usage of those apps including where you use them, how frequently you use them, and in what capacity you use them (for example, it knows whom you are talking to on Facebook).
Based on the videos you watch, your religion, political leanings, economic status, personality type and behavioral traits can be inferred. For example, Google knows if you are pregnant or if you are facing mental health issues.
Such information can be then used to manipulate user behavior online.
Breakdown of the Google Takeout document (don’t freak out)
The Google Takeout document
contains every single Google search that you have made, the websites you have accessed, and all the images you have downloaded.
The Google Calendar document details all the events you have added, if you attended them, and at what time did you attend them.
Further, the Google Drive document contains the files that you have already deleted from the platform.
It doesn’t end here…
The Gmail document stores every e-mail you have sent or received, even if they have been deleted.
The downloadable file lists every Google Ad you have ever clicked on and every app you have used.
And let’s not forget, all of this concerns a single Google account. If you have more than one Gmail IDs, double the data exploitation.