A Quick Tip
How to rename your starred places on Google maps
Previously it could be done it normally, but now you that option is not there anymore. What you have to do is to go to Google Bookmarks (https://www.google.com/bookmarks/) and edit it from there.
This feature comes handy when you try to save an unnamed place or try to save an address/coordinate as something like the “Batcave”.
Thanks to Abubakr Elkabany for the idea.