i saw a lot of people interested on Ruby, so i tried to see what this thing. i didn't find it really interesting and PHP is more advanced; ruby is cool and good for small projects for amators. (my point of view)
i think it means the number of accomplished tasks.
as it says it the blog
{
We're using Pivotal as our bug tracking system. In Pivotal, you assign points to features and bugs. Roughly, the points represent the time and difficulty of completing each item.
}
i have tried such methods, it seems to work fine (twitter.com/omarabid) as the number shows more than,14,000 followers, but in conversion you won't get even 5 unique from a tweet
However it can't compete with Google Analytics features