The problem relates to something called BGP routing, and it took down every part of Facebook's business.

Boarder Gateway Protocol (BGP) helps networks select the best, most efficient path for internet traffic.

The New York Times earlier today shared a tweet where Ryan Mac, their tech reporter, in a tweet said that the internal tools and communications platforms, including Workplace were not working. In his tweet, Mac also said that no employees were able to work calling the event a ‘snow day’.