Tablets are great devices to leave on a coffee table and share, but they’re intensely personal. They provide direct access to your email, signed-in apps, and even your Chrome browser history from your PC.
Modern Android tablets running Android 4.2 or newer provide a way to set up multiple user accounts, allowing you to share your tablet with anyone. You can create a guest account to share or create multiple accounts for specific people.
via How-To Geek http://www.howtogeek.com/170191/share-your-android-tablet-and-keep-your-privacy-with-a-guest-account/