DevOps improves software delivery speed and quality through a list of practices that pursue an agile mindset. The terms that first come to mind when you mention DevOps are continuous integration, continuous delivery and deployment, collaboration, automation, and monitoring.
DevOps means different things to different teams. Some teams are all about automation, while others do things manually and still consider that they are doing DevOps. Some consider it a culture and a mindset-shaper.