Suggest an editImprove this articleRefine the answer for “What does "image immutability" mean?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)**Image immutability** means that an image cannot be changed after it has been created - it is "frozen" in the form it was built in. **Key point:** immutability = the image cannot be changed, only a new one can be built, so it always stays stable and predictable.Shown above the full answer for quick recall.Answer (EN)ImageImage immutability means that **an image cannot be changed after it has been created**. It is "frozen" in the form it was built in. If something needs to change (adding a package, updating a config, etc.), Docker **does not edit the old image**, but **creates a new one based on it**. ### **Why this matters (junior level)** - **Predictability** - the same image always starts the same way. - **Repeatability** - it's easy to reproduce the environment on any machine. - **Security and version control** - you can keep `v1`, `v2`, `v3` and know what's inside, without unexpected changes. **In short:** Immutability = **the image cannot be changed, only a new one can be built**, so it always stays stable and predictable.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.