Where Am I? - Internet Basics
3. Browsers
3.7. Browser Tabs
It is possible to have several websites open at the same time. This is helpful if you are working in one area and need to refer to other websites.
Browsers have tabs across the top. While you are in one website, you can click on a new tab and open another browser window and search for another website.
In this example from Internet Explorer, there are three websites open: Google, Commonwealth of Learning and Wikicommons. The user is currently viewing the Commonwealth of Learning page. To switch between the websites, click on the relevant tab.