What do you do on twitter?

[Patrick Star]

and how is it different from facebook?
why are people making so many simple tweets which sometiems make no sense,

[Max]

At Twitter, you can write small bursts of information called tweets. Each Tweet is 140 characters. You can include photos, videos and conversations directly within tweets in one single place.

[masseur]

...and you can search on names, topics etc. Follow and be followed: friends, celebrities, clubs, organizations etc.