It's way better organized than email. You can edit things together following the same format (not the dozen different ways people will reply to emails), you can

It's way better organized than email. You can edit things together following the same format (not the dozen different ways people will reply to emails), you can edit, know things will look the same for everybody, know for sure everybody has access to everything and can search, everybody sees the same categories (not your own special way of organizing things while other coworkers are lost in the their mess). It's more a mix of wiki+email+chat.