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.
3. Your entire search history
Google saves all your searches and ads you’ve clicked on.
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.