SSH stands for Secure Shell. If you have a Linux server you can access that server's Shell from a remote location using SSH. if you don't know what Shell is, you can think of it as something similar to the command line in windows. Depending on your access level things like installing applications, file management and etc. can be done via SSH. So overall SSH can be used for managing a linux server or sometimes an account on a linux server.
I had no clue about SSH but always have heard people talking about the same. Now I’ve got the clear information. Thanks for the question and the answer.
ssh is secure shell which means u use port 22 to connect to a server ( dedicated or vps ). the use in hosting business, u will need it to access your server remotely
Its used for basically running servers under a command line, like cmd,exe for windows. Download Putty to access it.