Continuous Integration/Continuous Deployment - automated process for testing and deploying code changes quickly and safely. Like an assembly line that automatically tests and ships products.
When developers push code changes, CI/CD automatically runs tests and deploys to production if everything passes, enabling multiple releases per day.
All major clouds provide CI/CD by combining source control, build/test runners, artifact storage, and deployment orchestration. AWS commonly composes multiple Code* services; Azure centers on Azure DevOps (especially Azure Pipelines); GCP uses Cloud Build plus Cloud Deploy for releases; OCI bundles most capabilities under OCI DevOps.