What is the difference between shift key and control key?

Well, if you push down on a shift key, and press a button with a letter on it, you would be capitalizing that letter. When pushing the control button, and a letter, it is a shortcut to a special function in the computer. Such as Ctrl+H is your browser history, Ctrl+t would be opening a new tab, Ctrl+W is closing a tab. There are lots of shortcuts, try some out!