Suggest an editImprove this articleRefine the answer for “What is a Docker image tag?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)A **Docker image tag** is a label assigned to an image to distinguish its versions. **Key point:** a tag is a version or label of an image that helps distinguish variants of the same Docker image.Shown above the full answer for quick recall.Answer (EN)ImageA Docker image tag is a label assigned to an image to distinguish its versions. Usually the tag is used as a **human-readable version name**, for example: `latest`, `1.0`, `dev`, `prod`. ### **What a tag looks like** ```bash nginx:1.25 python:3.10 myapp:latest ``` Where: - `nginx`, `python`, `myapp` - the image name - `1.25`, `3.10`, `latest` - the tag ### **Why a tag is needed** - to keep **multiple versions of the same image**; - so that **deployment, testing, and development** work predictably; - so you can **roll back to a specific version**. ### **A detail worth noting** If no tag is specified, Docker **defaults to** `:latest`. **Summary:** a tag is a version or label of an image that helps distinguish variants of the same Docker image.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.