Facebook just bought CrowdTangle, a tool that publishers use to dominate social media (FB)

Facebook has acquired CrowdTangle, a four-year-old tool used by publishers like Vox, BuzzFeed, and Mic to track how their content is shared on social media.
The two companies announced the deal on Friday for an undisclosed sum. CrowdTangle had raised $2.2 million in funding from investors like Betaworks and Advancit Capital.
Facebook's Page Insights tool already lets publishers track the performance of their Facebook pages, but CrowdTangle can track content across other platforms, inc