You may have seen apps and websites that offer a simple "Sign in with Google" option. Selecting it often gives those apps, websites and Chrome plug-ins access to your private information including your name, gender, e-mail address and the country you live in.
You may have long forgotten which ones you granted permission to, so it's time for you to check.
Click on any app to see more information about what they collect.
If an app says it has "full account access" that means it can view and make changes to nearly everything but Google Pay and your password. When Pokemon Go first launched it required full account access, for example.
Some might surprise you: I found an app named Wavebox still has access to my account info even though I haven't used it since I tested a free trial last June. It still has access to my mail, contacts, and calendar on top of my basic account info.
That's it. Now you've regained control over the apps that have access to your account and stopped old ones from getting your info.