Gmail is the most useful email service. Email is use to send messages and documents to friends, family or Office. Gmail.com is provides email service to every one with free of cost for life time. It is fast and easy. And for Android user without Gmail account his/her Android is meaningless. Every android user should have gmail account. Now a days everyone work in internet like to download game or software from "play store " gmail is needed. And don’t have to login every Google developer websites again.