Hubs are simply online articles written by people who signed up for Hubpages. The topics are voluntary as long as they are in compliance to the rules set by Hubpages (no adult content, no racism etc). You can start writing your hub by clicking to: start a new hub on your profile page after you sign in. Read about writing online or writing on Hubpages by typing these keywords into the search box (there are a lot of great hubs on these topics, on earning money online, drawing traffic, backlinks etc). Upload an image to your profile and add some info about yourself. Do some reading and I am sure you will find Hubpages and writing hubs a great place to meet people and have fun - let us not forget - also a great opportunity to earn some extra money!