The Reporters' Collective's member Kumar Sambhav and ad.watch's Nayantara Ranganathan summarise the year-long probe into political advertisements on Facebook. We investigated more than 5 lakh political advertisements on Facebook and Instagram to assess the influence of Facebook on election campaigns in India. We found evidence that the social media giant's policies and algorithm systematically undercut political competition in the world's largest democracy by giving unfair advantage to BJP.