You can just put proofofbrain as a tag. But to stake POB (proofofbrain tokens) You will need to go to their site.
POB also earns you hive and HBD. You win one more token.

All your hive keys will wok on POB as it is a tribe. Offshoot of hive if you like.

P.S. always willing to help if you need answers please ask.