Follower Engagement ranks accounts by the average number of times an account is retweeted by each of its followers.
Tweet Efficiency is the number of times an account is retweeted during the given month, divided by the number of tweets made.
Follower Growth ranks accounts by the percentage growth of their follower base, over the selected period of time.
Total Retweets sorts accounts by the total number of retweets accumulated over the selected period of time.
Total Followers sorts the accounts by the total number of followers they have.
Recent Additions lists the accounts in the order that they were added to the tracker.