Control what advertising you receive and check if unauthorized persons have been on your Google account.
Medium site has listed 6 things that Google knows about you. This can be useful to know.
Here you can see:
1. Google’s profile on you
Decide what type of advertising you receive.
https://www.google.com/ads/preferences/
2. Your location history
If you use the Android operating system and has given Google access to this information.
https://maps.google.com/locationhistory
3. Your entire search history
Google saves all your searches and ads you’ve clicked on.
https://history.google.com
4. See which devices are gone in to your Google account
If you are concerned that an unauthorized person has been in and snooped. If you have a mobile via the job, IT technician at your work be seen.
https://security.google.com/settings/security/activity
5. See which apps have access to your data
… And take away rights if you so desire.
https://security.google.com/settings/security/permissions
6. How do you export your data
You can move bookmarks, mail, contacts, YouTube videos and more.
https://www.google.com/takeout