# Tags

This article explains how **tags** work in Model Reef.

You will learn:

* Where tags can be applied.
* How tags help organise and filter work.
* How tags support review and ownership workflows.

Tags are flexible labels you can attach to items across a model to keep them organised.

{% stepper %}
{% step %}

### What you can tag

You can attach tags to:

* Variables and drivers
* Data Library entries
* Branches
* In some cases, dashboards or custom reports

Tags are usually short phrases such as:

* `Needs-review`
* `Approved`
* `Client-input`
* `High-impact`
* `Staff-costs`

You can define your own tagging conventions to match your workflow.
{% endstep %}

{% step %}

### Who can create and edit tags

Permissions for tags follow the same pattern as other collaboration tools:

* **Owners and Editors**
  * Can create, assign and remove tags on objects they can access.
* **Viewers**
  * Can see tags on objects they can access.
  * Cannot change tags.

Branch level permissions still determine which objects and tags are visible to each user.
{% endstep %}

{% step %}

### Using tags in workflow

Tags are particularly useful for:

* Marking assumptions that need client confirmation.
* Flagging high impact variables for focused review.
* Tracking which items are complete, in progress or blocked.
* Grouping variables by theme, for example all staffing related assumptions.

You can combine tagging with search and filters to quickly navigate to relevant sections of a large model.
{% endstep %}

{% step %}

### Tagging conventions

To avoid confusion:

* Agree on a set of standard tags with your team.
* Use consistent spelling and format.
* Avoid creating many near-duplicate tags that mean the same thing.
* Periodically review and clean up unused or obsolete tags.

Good tagging discipline makes large models easier to maintain and review.
{% endstep %}
{% endstepper %}

***

## Related articles

* [BOM & Unit Cost Modelling](/use-cases/manufacturing-and-production/bom-and-unit-cost-modelling.md)
* [Data Workflows & Automation](/how-tos/data-workflows-and-automation.md)
* [Roles Overview](/help/permissions-and-collaboration/roles-overview.md)
* [How to Enter Drivers](/syntax/how-input-fields-work/how-to-enter-drivers.md)


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