# Manage Data Dictionary Descriptions

The data dictionary provides information about the columns within the data source, including column names and value types.

As a data owner, you can manage data dictionary [descriptions](#manage-data-dictionary-descriptions) and column tags. For other guides related to the data dictionary, see the [Related guides section](#related-guides).

## Manage data dictionary descriptions

1. Navigate to the **Data Dictionary** tab.
2. To add or edit column descriptions, click the **menu** icon in the **Actions** column next to the entry you want to change and select **Edit**.
3. Complete the fields in the form that appears, and then click **Save**.

## Related guides

### Reference guide

For information about the data dictionary, see the [Data sources in Immuta overview](https://documentation.immuta.com/2024.2/data-and-integrations/data-source-overview#data-dictionary).

### How-to guide

In addition to managing data dictionary descriptions as outlined above, data owners or experts can also manage [column tags](https://documentation.immuta.com/2024.2/data-and-integrations/tags/how-to-guides/managing-tags).