> ## Documentation Index
> Fetch the complete documentation index at: https://docs.omni.co/llms.txt
> Use this file to discover all available pages before exploring further.

# topic_group_descriptions - Model files

> Defines descriptions for topic groups.

Topic group descriptions - identified by [`group_label`](/modeling/topics/parameters/group-label) on topics - are displayed in the topic selector to help users understand the purpose of each topic group.

## Syntax

```yaml theme={null}
topic_group_descriptions:
  <group_label>: <description>
```

## Properties

<ParamField path="topic_group_descriptions" type="object" required>
  A map of topic group description definitions where each key is the name of a topic group.

  <Expandable title="topic_group_descriptions properties" defaultOpen="true">
    <ParamField path="group_label" type="string" required>
      The name of the topic group. This must match the [`group_label`](/modeling/topics/parameters/group-label) value defined on one or more topics.
    </ParamField>

    <ParamField path="description" type="string" required>
      A description of the topic group that will be displayed in the topic selector.
    </ParamField>
  </Expandable>
</ParamField>

## Examples

```yaml theme={null}
topic_group_descriptions:
  Sales: Topics related to sales data
  Marketing: Topics for marketing analytics
```