What does 'cd -' stand for?

Question

In a bash shell script today I noticed the below command at the end of the script. I know what is cd but I am unaware of the significance of a dash after it.

Answer 1

cd - brings you back to the last directory.

$ cd ~/Desktop
$ pwd
/Users/daknok/Desktop
$ cd /
$ pwd
/
$ cd -
$ pwd
/Users/daknok/Desktop