https://www.techradar.com/news/what-is-devops

Born out of the difficulties of a challenging data migration project and getting siloed teams to work together better, DevOps has evolved into a movement to facilitate software development and its implementation, while improving reliability and increasing security. While the process of combining teams is hardly seamless, when done successfully, DevOps delivers significant benefits across businesses whether they are large or small.

DevOps combines the words Development and Operations, with the term originating in 2009 and attributed to Patrick Debois, who is widely considered the ‘Godfather of DevOps’ and is the founder of the popular DevOpsDays conference.