What can i do on keybase.io ? How does the invites benifit my account?
It's for identity management/PGP -
See:
https://keybase.io/docsYou can also link other accounts, like Twitter, Github etc.
I guess if you aren't into PGP it's not something you would be interested in.
Would you like a free/vouch invite? PM me your email address and I can send you one.