Git-Workshop.md

@@ -2126,6 +2126,10 @@ I normally use a semester-branch scheme for my course materials (i.e., course
 site and example sets). At the end of a semester all changes are merged into the
 `master` branch.
 
+> A git branch is a sequence of commits. Think of a branch as a copy of a folder
+> containing a copy of source code. Multiple branches can be thought of as
+> multiple parallel folders.
+
 Before the Fall 2019 semester I needed to make quite a few updates dealing with
 code style, alongside the normal updates. This lead to four (4) new branches: