In Emacs you can bookmark files and directories (and lots of other things) so that you can quickly jump to them (similar to a browser’s bookmarks).
The basics are easy. Use C-x r m to make a bookmark to the file or directory you are currently visiting. You’ll be prompted for an optional name for your bookmark. For example, I use names starting dir- for bookmarks to directories so that they all appear together in the bookmark list.
You can use C-x r b to go to a bookmark, and you’ll prompted for the name of the bookmark. Use C-x r l to list all of the bookmarks.
There is a bookmarks+ package which adds extra features to the normal bookmarks, but I’ve not found that I need those extras so far.