We've all see those best of Vine compilations, but until today there hasn't been a way to actually tell which Vines are the most-watched Vines of all. "Loop count" takes care of that.
When you're on the Vine website, the little number in the bottom right corner of a given video will actually update in real time, showing you how many times a single Vine has looped over, and over, and over again. On the web embed version (like the one below), though, you will still need to refresh to see an updated count. But hey, it's better than nothing.