The 'MagicRecs' account is one of Twitter's experiments that brings customized reports to Twitter users through direct messages.
After following the MagicRecs Twitter account, users now have the opportunity to interact with the Twitter-operated bot to receive information. After starting a message with a simple "hi" or "help," users can begin to customize the types of information the bot will send. If several people you are following newly follow an account, or popular tweets are some of the notifications MagicRecs will privately send you.
Twitter users can initiate these options by sending messages to the bot like "users on/off" or "tweets on/off." To further customize the kinds of direct messages a user gets, other interactions with MagicRecs include saying "good" or "bad," helping to further customize what information is relevant and helpful to users.