Google has come up with the product Google wave but as it being not very user friendly it didn't become as popular as like other Google products despite of the excellent technology backing Google wave.

Google wave provides you to share and work in real time .

Like many people can work on same piece of document at time with quick updates feature  and its great idea being to do work in collaboration .

Google did provide Video tutorial but its working out in the way its expected to be.

One more thing it add people to you friends to wave list by default .

Google  opened  to public to Google wave with invites  so its not open to all.

Moreover to use Google wave you should have good internet speed else it won’t work and keep loading.