DevOps is a movement that envisions no friction between the development groups and the operations groups.
Why should you care about DevOps?
If you are involved in building software systems and your organization is interested in reducing the time to market for new features, then you should care. DevOps practices will influence the way that you organize teams, build systems, and even the structure of the systems that you build. If you are a software engineering student or researcher then you should care how the adoption of DevOps practices could influence the problems that you choose to work on.
DevOps is a set of practices intended to reduce the time between committing a change to a system and the change being placed into normal production, while ensuring high quality.