Nate Hoffelder says every author needs four versions of their bio: a Twitter bio, a podcast intro, a speaker bio, and an Amazon/Goodreads profile bio.
Don’t stress, though — you can start with “pretty good” and tinker with them over time, rather than nailing them right away.
Check out Hoffelder’s tips on writing each type, plus see how he revised his own versions of them, on The Digital Reader.