Get-good-at-git.md

@@ -79,9 +79,9 @@ repository is either ssh or https address of the repo.
 
 ## Commit
 
-A commit is like a checkpoint : you have modified multiple files, and you [push](#push) them to the [origin](#origin) with a commit message like "hey I've done this and that".
+A commit is like a checkpoint : it is a set of modification to one or multiple files accompanied by a message summing up these modificiations. These modifications are then meant to be [pushed](#push) to the [origin](#origin).
 
-A commit will contain the files [added](#add) to it. Any commit will be accompanied by a **commit message** that NEEDS to contain the important things that has been modified in the added files.
+A commit will contain the files [added to it with `git add`](#add). Any commit will be accompanied by a **commit message** that NEEDS to contain the important things that has been modified in the added files.
 
 ```bash
 git commit