Quote:The Google Suite offers you a handy way to view all the changes that have occurred in a file on Google Docs, Sheets, or Slides. This is extremely useful when you’ve made lots of changes to a file or are working as part of a team and need to track the changes made to a shared file. Here’s how you can view the recent changes to your Google Docs File.

How to See Recent Changes to Your Google Docs File

Note: If you don’t have edit permissions to a file, you won’t be able to view the Version History section of a file.
First, open up a file you have stored on Google Docs, Sheets, or Slides. I’ll be using Google Docs, but the process is the same on the other two services as well.

Full reading: https://www.howtogeek.com/394447/how-to-see-recent-changes-to-your-google-docs-file/