Political ads on Facebook aren’t like ads on TV – it’s remarkably difficult to understand what your friend or neighbor is seeing. Candidates have reportedly run fine-grained ads to pick up supporters who care about esoteric issues. This project aimed to crowdsource a corpus of political Facebook ads and their targeting data. The project isn’t over yet (I’m writing this Nov. 3, 2016), but we’ve already collected more than 17,000 ads.

Here’s one story I wrote from the data we collected.