The Tab key is used for making perfect indentations while you are typing a letter or creating another document, but it has another benefit as well. Instead of using your mouse to point and click in text boxes when you are filling out forms online, just use the Tab key. The cursor will skip to the next box - either sideways or down depending on the form. It's a big time saver. So if you are registering for an Email account, or creating an account to shop, all those text boxes are not so daunting when you remember to use the Tab key.