The practice of treating development and operations as one responsibility: the people who write the code also automate how it is built, deployed, monitored, and recovered.
When operations are somebody else's problem, releases become rare and risky events. DevOps is what turns deployment into a routine action that happens several times a week without ceremony.
We keep infrastructure as code, automate environments and deployments, set up monitoring and alerts before launch, and document recovery procedures — so the system is operable by your team, not only by us.