The document discusses the author's online identity across 3 categories: personal, professional, and university. For personal use, they primarily use Facebook to connect with family and friends. Professionally, they use Twitter and Fango for their job in sports production. For university, they use Wordpress for blogging assignments and ABC Pool for a class, though they find it less user-friendly. Overall, the author considers themselves a passive online user who is most engaged on Facebook for personal connections.