Live a Great Story.
Use this space to tell people what you do and why and how you do it. What're you known for? Who likes you? What's your number one competitive advantage?
Include all the things that make you unique and better than the average schmo. Do you have a patented 13-step process for novel writing which results in New York Times Bestsellers? You gotta mention that.
Other good things to weave into this copy include: awards won, distinctions given, number of lip balms sold, personal philosophy (just keep it short), interesting bits, and anything that makes a reader think you'd be awesome to be friends with.