Gmail tips and tricks: Five ways to upgrade your email experience on a PC or a smartphone

If you suddenly remember you didn't attach a file or forgot to add some details, Gmail lets you 'undo' your sent email. — 123rf.com

Gmail is the most popular free email service available today, and the service is used by most Android smartphone users, who usually own a Google account. While Gmail is a very simple service to learn and use, Google's mail service can be a powerful tool if you know how to use it properly. The free email service has several hidden features and settings that can help users manage their inbox, perform tasks much more efficiently and simply cut through the clutter.

From keyboard shortcuts to aliases, email blocking, undo sending, and confidential mode, Gmail has a lot to offer. Here are some of the most useful ones that you can use on Gmail right away, on your computer or on your smartphone.