I created a Ruby file called Player.rb in the following path: Jwan/studio_game

Jwan is my name so I think Jwan is my user file.

How do I permanently add the path to the terminal so I don't have to type in pwd and cd commands everytime I open the terminal?

Also, what does the code below do. I tried finding the answer myself but I do not understand what the code below does. What parts of the code below do I replace?

export PATH=/users/ophir/android-sdks/tools:$PATH