Still, it is important to be mindful of the apps to which you granted permissions and periodically review the permissions. Did you stop using an app? Revoke its permissions. Did a company close operations and take your favorite app into a digital oblivion? Revoke the app's permissions. Did your favorite app fall out of favor, or is it something you just don't use anymore? Revoke its permissions.
Revoking app permissions is part of a general Google security checkup. The security checkup is quickly and easily done. You should perform it on your school account, and especially on any personal or Google accounts you have. The holiday break is a great time to run the security check and it takes just a few minutes. The video below demonstrates one way to launch and complete the Google Account Security Checkup.