Do you know your web browser is not the only way to access your gmail account? Surrounded by variety of gadgets, iphone, ipad, android, notepad one might think to make life simpler and easier by sending and receiving emails through different means.
  
Gmail+Outlook+Mobile
The other ways of accessing your gmail account and sending/receiving emails are:
-POP
-IMAP
-Mobile
-Desktop Notifier
POP:  Post Office Protocol, allows you to download your Gmail inbox messages from Gmail’s server to your computer using Microsoft outlook, Thunderbird or other such program. user can access emails from desktop even if not connected to the internet.
IMAP: Internet messaging Access protocol, allows the user to download emails from Gmail’s servers to the user’s computer using some program like Outlook, Thunderbird, Apple mail etc, sounds similar to POP, well its not because IMAP provides two-way communication between your Gmail on the web and your email account.
Enabling IMAP, user can access Gmail from any device, mobile, office pc, and finally at home. It is comparatively a better option to use IMAP than POP, since using the POP method increase the risk of downloading same messages multiple times and even losing messages , on the other hand due to two-way sync capability of IMAp between your web Gmail and your Email Client on desktop it ensures that same emails are not downloaded multiple times.
Mobile: Google always makes sure that the users should find using their services with maximum level of comfort, therefore not only Gmail but other Google products like Google Docs, Maps, Blogs, Videos, Images , Google+, Buzz, Google Earth to name a few, are available on almost all the phones supporting GPRS.
To check your gmail on your GPRS activated phone simple type m.google.com!
Desktop Notifications: Desktop notifications for Google are pop-up kind of messages that appear on bottom right of your Gmail while you are working exhaustively and literally have no time to scratch your head, but hey! you missed that important email from your client just sent you reminder about the meeting tomorrow, no problem Gmail is here, enabling this email notification one can simple check email at a glance if there is something really important.