# Slot personalized

Learn how to track content served in a slot.

This event tracks which content is served in a slot for a specific user. The delivered content can be fully personalized, part of an experiment or test, or the default static fallback.

> **Automatically tracked**
>
> The SDK automatically tracks this event when the application fetches content for a slot.

## Input properties

This event has no input properties.

## Processed properties

These properties are automatically tracked:

- `personalization`: `object`

  The available information about the slot.

  - `slotId`: `string`

    The ID that uniquely identifies the slot.

  - `slotVersion`: `object`

    The assigned version of the slot.

    - `majorVersion`: `number`

      The major version.

    - `minorVersion`: `number`

      The minor version.

  - `contentId`: `string`

    The ID that uniquely identifies the content.

  - `experienceId`: `string` (optional)

    The ID that uniquely identifies the experience.

  - `audienceId`: `string` (optional)

    The ID that uniquely identifies the audience.

  - `languages`: `string|null` (optional)

    The locale code used to fetch the content.

  - `assignedVariant`: `object` (optional)

    The assigned variation of the experiment.

    - `experimentId`: `number`

      The ID that uniquely identifies the experiment.

    - `variantId`: `number`

      The ID that uniquely identifies the variant.

## Payload examples

Below are some payload examples for this event:

**Processed payload**

```json
{
  "type": "slotPersonalized",
  "personalization": {
    "slotId": "91fccc5b-5661-4ba1-9cec-b8e141c3e13a",
    "slotVersion": {
      "majorVersion": 1,
      "minorVersion": 0
    },
    "contentId": "e2480d68-b5d1-4d17-b0e4-e5c2e3ded6c2",
    "experienceId": "e25b205d-0aaa-4db5-9d75-2fa4e3a7e1e7",
    "audienceId": "77e4bda3-2b25-430a-9d87-5bbb9ff90bb1",
    "assignedVariant": {
      "experimentId": "e3e8db14-f4fb-427f-a4a3-cfd763397a83",
      "variantId": "a0caab39-c71c-4327-85e9-a890fdff9e0c"
    }
  }
}
```

## Explore

- [Analytics](/reference/analytics): Learn how to analyze your dashboards.
- [CQL](/reference/cql/introduction): Learn how to create audiences for segmentation and personalization.