Gmail is an experiment in a new kind of webmail, built on
the idea that you should never have to delete mail and you should always
be able to find the message you want. The key features are:
Search, don't sort. Use Google search to
find the exact message you want, no matter when it was sent or
received.
Don't throw anything away. 1000 megabytes of
free storage so you'll never need to delete another
message.
Keep it all in context. Each message is
grouped with all its replies and displayed as a
conversation.
No pop-up ads. No banners. You see only
relevant text ads and links to related web pages of
interest.