The document discusses various features for social network sites built with DNN including login/registration, email templates, profile pages, groups, member directories, and third party options. It provides guidance on implementing these features in DNN and notes some issues to watch out for, such as bugs. Additional recommendations include using templates from MailChimp for emails and checking the DNN documentation for token syntax. Throughout the document, it reminds readers to include the #DNNCon hashtag in tweets about the conference.