I hope that helps.
Hey there @alharlow,
SSH is a more advanced way of interacting with the Linux command shell instead of using a GUI like cPanel to control it. There are a LOT of things you can do from the command line, including things that may break your site if you're not careful.
I would suggest looking at the links @JesseW provided and doing a bit of research on the subject. Most things can be taken care of from the cPanel interface itself and I recommend using that if you don't know how use the command line. You can do some really neat things in there, though. For example, using the wp-cli can be amazing. More information here.
I would say just be careful. Make backups before making changes. Do some research and see if you actually need to use SSH for anything.
* Please note that I offer free advice on this forum. I DO NOT PROVIDE ANSWERS VIA PM. If you would like personalized help, you can see my pricing on my services page. Otherwise, please ask your question in the proper forum so the answer can assist EVERYONE in the community and not just you. Thanks! *