Original: It is a large network of websites including such high profile sites as BBC News and Sport, the on demand video and radio services co-branded BBC iPlayer, the pre-school site Cbeebies, and learning services such as Bitesize.
Simplified: It is currently the 4th most popular web service in the UK, and includes features such as BBC News, BBC Sport, BBC Weather, BBC iPlayer and learning services such as Bitesize.