The document discusses key features of the Bitrix24 social intranet including the activity stream, instant messenger, liking content and ratings, managing tasks and projects, CRM and sales funnel functionality. The activity stream aggregates information from across the system. The instant messenger allows for conversations and messaging between users. Liking content influences search rankings. Tasks and projects can be managed directly from the activity stream or from notifications. The CRM allows for contact management, segmentation, and email campaigns, and automatically generates a sales funnel.