This document provides an overview of microservices architecture and how BuzzFeed uses it with Amazon ECS and Docker containers. It discusses the benefits of microservices and characteristics. It then details how BuzzFeed developed their WatchBot platform on Amazon ECS, including that they now have over 400 services deployed across 7 clusters in 2 regions, with over 180 users and 39,000 deploys. The document also discusses lessons learned in developing the platform and current challenges.