CI/CD is the practice of building and testing every code change automatically, then releasing changes that pass through a repeatable pipeline. It shortens the gap between writing code and running it in production.
DevOps is a way of building and running software in which development and operations work as one team. Automation, shared ownership and fast feedback let that team ship changes often and safely.
Infrastructure as Code (IaC) is the practice of describing servers, networks and cloud services in version-controlled files. Environments are then created and changed by running that code rather than by clicking through a console.
Platform engineering is the discipline of building an internal developer platform that product teams use to build, deploy and run software. It bundles shared tools, templates and self-service workflows so teams stop reinventing infrastructure.
Test automation is the use of software to run tests, compare results with expectations and report failures without manual effort. It lets teams check every change quickly and consistently.
Blue-green deployment is a release technique that keeps two identical production environments and moves traffic from the old version to the new one in one step. The old side stays ready for instant rollback.
Code review is the practice of having other engineers examine a change before it is merged. Reviewers check correctness, design, security and readability, and share knowledge along the way.
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