Terminal does not change directory I am not being able to change directory in terminal and I don't understand why.

This is what I get:

Annes-MBP:~ anne$ /Applications 
-bash: /Applications: is a directory
Annes-MBP:~ anne$ cd/Applications 
-bash: cd/Applications: No such file or directory
Anness-MBP:~ anne$
cd is the command, /Applications its parameter, and you need so separate commands and parameters by a space character. So in your case it's

cd /Applications


or, if you want to go back to your user's home folder

cd ~


or simply

cd