When you have the tracker in the backlink tracking mode, it now also tracks Facebook Likes and Twitter Tweets (in additional links, pages in URL and PageRank). https://tools.digitalpoint.com/tracker
Do you have to set up something for a domain name you are already tracking for it to show likes, etc? (Or is this to track if you put in just your facebook page?)
It's nice that they include Likes and Tweets now. This shows how effective social media campaigning is for SEO.