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

# Add an Event Category

Event category stores user action information. Perform the following steps to add an Event category:

<Steps>
  <Step>
    Enter a Catalogue Field. As you type, suggestions based on the existing Catalogue Fields appear. You can choose a suggested Catalogue Field or click **+Add Catalogue Field** to add a new field.
  </Step>

  <Step>
    Map the Catalogue Field to its corresponding Source Field. Same as the above behaviour, you can choose a suggested Source Field or click **+Add a new Source Field** to add a new field.
  </Step>

  <Step>
    Enter a description for easy identification.
  </Step>

  <Step>
    Choose one of the following as the **Data Type**:

    * String
    * Integer
    * Double
    * Timestamp
    * List of String/Integer/Double

    <Note>
      **Note**

      Ensure that you consider the following points while selecting the List Data Type:

      * You can only map a source field of the data type `List` to a catalogue field of the data type `List`. For example, if the source field is of type `List of String`, then you can map it to only `List` type attributes in the Catalogue field drop-down of the source mapping screen.

      * When sharing source data containing `List` type information, ensure that you use the correct format and avoid null values. Otherwise, it might lead to mapping issues or data being dropped during the data ingestion process.

      * When mapping Event attributes, you can map a single value source field to a single value catalogue field and a `List` of source fields to `List` of Event attributes only. The Event attributes are always stored as new records in the system without appending to the existing information. This is because events are timestamp-based information.
    </Note>
  </Step>

  <Step>
    Choose **Event Category** as the **Category**.
  </Step>

  <Step>
    Under advanced settings, a Group Name appears by default. You can choose a value from the drop-down menu or click **+Add a new group** to add a new group name.
  </Step>

  <Step>
    Save the changes.

    <Frame>
      <img src="https://mintcdn.com/zeotap/htBST1bc1LEJ85Nd/articles/unify-customer/Storage/unify-customer/unify/event_cat.png?fit=max&auto=format&n=htBST1bc1LEJ85Nd&q=85&s=88727a8e71d98169db8ebdcd0b4326ff" alt="" width="3566" height="1996" data-path="articles/unify-customer/Storage/unify-customer/unify/event_cat.png" />
    </Frame>
  </Step>
</Steps>