Need help with finding help on master

That is a bus. It is a 'track' where you can send all your audio tracks to for control of the total output of the song. You can't record in it, though.
You can also add more buses if you want; one for vocals, another for guitars or drums, whatever you want to control the volumes of a group of instruments in the mix. You can name the buses whatever you like, usually what the instrument(s) going to it are. Output those buses to the Master, the Master to the sound card/audio interface.
Just click the outputs of your audio tracks and you should see Master as an option, plus whatever other buses you may have in the project.