Although I didn't mention all the presently available possibilities, there are quite a few. Google Apps Script is an evolving toolbox; the developers' team is still at work to expand its possibilities and application fields.

If you're curious, you should have a look at the release notes on the Release Notes page (https://developers.google.com/apps-script/releases/) they update every month, and you'll get a pretty good idea of what they've already accomplished and the number of issues they have fixed. I read it regularly, and I must say that I'm often quite impressed.