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 .