I wonder, on a site like this, what measurement they're looking for - time spent on article, etc? Maybe virality of the post to FB / linked in buttons? I'd lov

I wonder, on a site like this, what measurement they're looking for - time spent on article, etc? Maybe virality of the post to FB / linked in buttons? I'd love to run a split-test of all bullets no header vs. current format - would be informative, maybe will try in one of my own blog posts . . .