On Monday, Oct 12th at 7:00 AM the new Box User Interface will be activated for Box online. The new UI includes the Collections feature; the ability to organize the content of your Box account. No features have been removed, although a few items have been moved to a new location.
Read more about the new UI at https://support.csuchico.edu/TDClient/1984/Portal/KB/ArticleDet?ID=112975