Most mice, except for the really old ones, have a left click button, a right click button and a scroll wheel in the middle. Left click is the most used button followed by the scroll wheel and then the right click button. But did you know that you can click on the scroll wheel as well? The scroll wheel click has many useful purposes. The main one is probably opening a new tab on a web page. If you click on a link on a web page with your left click, it will open that page. If you click down on the scroll wheel on a link, it will open that page in a new tab while still keeping your current page open. This is very useful when doing a Google search and you want to try different search results. If you have a tab that you want to close on your web browser - and clicking that tiny X is difficult - you can click the scroll wheel on a tab and it will only close that tab. The other thing the scroll wheel does on web pages, or any page that you can scroll on, is that when you scroll click in an empty area on a page it will turn your whole mouse into the scroller. For example, if you did a Google search and wanted to scroll to the bottom of the page you would use the scroll wheel, but if you click the scroll wheel in an empty area on the page and very slightly move your mouse down it will start moving the web page down like you would if you were scrolling. If you move the mouse up it will move the page up, move it to the side it will go to that side, etc. The more you move your mouse, the faster the scroll will become. So, be careful how far you move your mouse because you could lose your spot very quickly if not paying attention.