-`/` is the root of your system to reach core folders, such as `system`, `users`, etc.
-`~` is the home directory, usually the path `/users/username`. Move back to folders referenced relative to this path by including it at the start of your path, for example `~/projects`.
-`~[number]` will cd to that entry from the output of `dirs` directories can be pushed or popped to the 'dirs' stack using `pushd` and `popd` respectively.
The `cd` command is the daily workhorse for navigating through your path, but closely related are the `pushd`, `popd`, and `dirs` commands, which maintain a *stack* of your directory movements and allow you to more quickly navigate through this stack.