Our new investigation reveals Facebook approved incendiary ads targeted across the sectarian divide in Northern Ireland. When political advertising was limited to the TV and billboards, everyone got the chance to see what political parties were saying. That meant that opponents had the opportunity to counter their claims, helping hold them to account, and voters heard the same messages as each other. That’s not the case today. Instead, digital tech platforms now harvest our data from the things we say, like and follow on their own platforms, the places we visit elsewhere on the internet and even the places we