This is the Goodreads main reading challenge which is run by the site, not by the individual groups on there. You can set the number of books you want to challenge yourself to read during 2014. It can be any number and you can alter the target number during the year if you find yourself getting ahead of the challenge, or falling behind.
You can also set up individual bookshelves on there to log the books you read each year, separately from the main Books Read shelf.
I use Goodreads quite a lot, now that I have got to grips with it, but don't bother with the Listopia, or Book Recommendations very much.
Happy to help if anyone has any questions or is confused about something on there.
I find it works well if you have a look at the various groups on there, find one or two that you like the sound of - like Book Vipers for example :o, join them and chat on there. You can then make friends with some of the people you get on with on there and see what they are reading, give and receive personal book recommendations from people who actually know what you like to read rather than the computer-generated Goodreads recommendations.
Hope that helps.