Having distinct environments for building, testing, and running your live site is one of the most effective ways to reduce risk.
Development
Where new features and changes are actively built, often on a local machine or an isolated environment disconnected from real customer traffic.
Staging
A close copy of production used to test changes in a realistic setting before they go live, catching integration issues development alone might miss.
Production
The live environment real visitors and customers interact with — the place changes should only reach after passing through the earlier stages successfully.
Why the Separation Matters
Each environment catches a different category of problem, and skipping a stage (going straight from development to production) removes an entire layer of protection.
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