Facebook’s Most Shared Story of 2019 All the social media experts always talk about how algorithm works for different social media, but no expert predicted how this 119-word Local crime story became the most shared Facebook story of 2019 (till now) with more than 800,000 shares. It’s against all the odds - from a local US TV station, very short content, no catchy misleading photos, no SEO. The headline is kind of misleading but misleading headlines also do get this much of reach, even if it’s from a mainstream News company. Maybe, experts still do not fully understand the Facebook algorithm.