# Nothing changed

Learn how to track periods of inactivity.

This event reports when a user becomes inactive on your site or application. Inactivity typically occurs when they stop interacting for a defined timeout period. It often means the user has switched tabs, moved to another application, or stepped away from their device.

> **Automatically tracked**
>
> The SDK automatically tracks this event after 30 seconds of inactivity, with decreasing frequency as idle time increases, capped at four events per hour.

## Input properties

This event has no input properties.

## Processed properties

These properties are automatically tracked:

- `sinceTime`: `number`

  The timestamp when an activity was last observed, in milliseconds since the Unix epoch.

## Payload examples

Below are some payload examples for this event:

**Processed payload**

```json
{
  "type": "nothingChanged",
  "sinceTime": 1630000000000
}
```

## Explore

- [Analytics](/reference/analytics): Learn how to analyze your dashboards.
- [CQL](/explanation/audience/examples/session-activity): Learn how to create audiences based on the session details.