[heartofgold]

For me personally: - I started out just learning navigation. How to move around within buffers, how to open multiple buffers and move around between buffers.

Then I learned several built in commands.

Years later I learned clojure, a lisp dialect. After learning it, and then looking back at emacs lisp (elisp), and a light bulb went on for me. You can write any elisp function you want, which has functions to manipulate text within buffers and much more. Using it you can create any kind of specialized editor function you can dream of, and you can call that function with "M-x function-name". If use use the function lots, then you can bind that function to a keystroke. (For example, if you wanted a completely custom function... to delete the current block of code, you could write an elisp function to go to move the point to the blocks beginning brace, set the mark, move to the matching brace, and then delete the region.)

There are several "modes" that define how buffers behave. A clojure mode will know how to highlight code and navigate around parenthesis. Magit-mode knows all kinds of commands for operating a git project, and org-mode knows commands to help facilitate note-taking.