# Topic and chapter labels
Use labels to mark a topic or chapter that describes a commercial or internal feature, something that is still in development, or applies to a specific version or technology. Labels help your readers understand at a glance whether content is relevant for them.
Each header can have only one primary label and multiple secondary labels. Your readers can hover over any label to see a tooltip with details about what the label means. If you define a URL for a primary label, readers can also click it to go to this URL, for example, to see a comparison of plans or editions.
## Define labels
To define labels, add the `labels.list` file to the [help module root](projects.html#help_module) next to `[writerside.cfg](writerside-cfg.html)` .
Here is an example of the `labels.list` file:
```XML
This is an example label
Go to www.jetbrains.com
Work in progressBetaThis is an experimental featureNew in version 2023.3
```
Use the `` and `` elements to define labels.
Every label must have an `id` used to reference the label. The `name` defines the text that renders next to the header, while `short-name` is used for primary labels in the [topic navigation block](structural-elements.html#topic-navigation). Primary labels can also define a `href` to point to some URL when the reader clicks the label.
Use the `color` attribute to define the color of the label.
To set the tooltip text for a label, define it as text inside the element, between the opening and closing tags.
## Insert labels
To use labels, add them as [<primary-label>](semantic-markup-reference.html#primary-label) and [<secondary-label>](semantic-markup-reference.html#secondary-label) elements inside [<topic>](semantic-markup-reference.html#topic) and [<chapter>](semantic-markup-reference.html#chapter) .
Semantic markup:
```XML
This is a labeled topic about some Beta version of an unfinished feature.
This chapter is marked with the JetBrains label,
applies to version 2023.3, and describes something experimental.
```
Markdown:
```PLAINTEXT
# Labels
This is a labeled topic about some Beta version of an unfinished feature.
## Some chapter
This chapter is marked with the JetBrains label,
applies to version 2023.3, and describes something experimental.
```