Hackercombat.com provide some tips on how to take advantage of Gmails not so obvious features. Gmail has a large storage capacity and looking for an email many times can be tedious. Gmail sends users who have given their cell phone number a code to log into their account. Users besides entering their password will have to write down the code that Gmail provided them. The same account tightly integrating Google to an Android device is the Gmail account itself. In any device with an Internet connection, the user can sign-up to Gmail without the hassle of any prerequisite.”]
Source: https://hackercombat.com/12-gmail-tips-tricks-for-everyday-email-users/