Have you ever gone back to your computer after letting someone use it for "just a second" and found it in disarray? Maybe they logged you out of all your accounts because they wanted to check Facebook or their e-mail. Or perhaps they did a little window-shopping on Amazon and now you're getting strange product suggestions on the home page. To help you and your guests maintain some sense of privacy while sharing the Web, you can use Chrome's guest browsing mode.
Guest browsing was first available in Chrome OS as a way to let Chromebook owners safely share their Chromebooks with others. The feature is available in Chrome for Windows too, but is considered experimental for the time being. If you're interested in trying it out, here's how to enable guest browsing in Chrome: