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Redirect

Pointing an old resource at a new resource.

Regression Testing

Ensuring changes to a system do not introduce new bugs in previously stable parts of a system.

Release Orchestration

Coordinating activities of a release in technology.  Usually, a release is not as simple as bumping a code version, there may be lots of additional steps like database updates, redirect changes, certificate updates, etc. and all of those events are handled through automated release orchestration.

Rollback

Reverting a running code version back to a previous state.