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

# Unique Sessions: Count of Distinct Visitor Sessions

> Track the number of unique sessions on your site. Measure traffic volume and visitor engagement with the Upstack pixel's session tracking.

<Tip>
  Count of distinct sessions tracked by the Upstack pixel. Each continuous visit from a user counts as one session.
</Tip>

## Formula

<Info>
  **Unique Sessions** = **COUNT** ( Distinct Sessions )
</Info>

### Formula Components

| Metric                | Definition                                                                                              |
| --------------------- | ------------------------------------------------------------------------------------------------------- |
| **Distinct Sessions** | Individual browsing sessions identified by the Upstack pixel, separated by 30-minute inactivity timeout |

| Metadata        |                         |
| --------------- | ----------------------- |
| **Type**        | Number                  |
| **Data Source** | [Upstack Pixel](/pixel) |
| **Aggregation** | Count                   |

***

## Example

Your store recorded **12,450 unique sessions** during a weekend flash sale:

| Day      | Sessions | Bounce Rate |
| -------- | -------- | ----------- |
| Saturday | 6,820    | 38%         |
| Sunday   | 5,630    | 41%         |

***

## How It Works

A session begins when a visitor loads a page tracked by the Upstack pixel and ends after 30 minutes of inactivity or at midnight. Returning visitors within the timeout window continue the same session; visits after the timeout start a new session.

***

## When to Use

| Scenario                        | Action                                         |
| ------------------------------- | ---------------------------------------------- |
| Measuring traffic volume        | Track total site visits over time              |
| Campaign effectiveness          | Compare sessions before and after launches     |
| Identifying traffic patterns    | Spot peak days and seasonal trends             |
| Calculating session-based rates | Use as denominator for conversion rate metrics |

***

## Related Metrics

| Metric                                                                                   | Relationship                                                      |
| ---------------------------------------------------------------------------------------- | ----------------------------------------------------------------- |
| [Unique Visitors](/reference/metrics/funnel/awareness/unique-visitors)                   | Distinct people across sessions (one visitor = multiple sessions) |
| [Page Views](/reference/metrics/funnel/awareness/page-views)                             | Total pages viewed across all sessions                            |
| [Session Conversion Rate](/reference/metrics/funnel/conversions/session-conversion-rate) | Conversions ÷ Unique Sessions                                     |

[See all Awareness metrics →](/reference/metrics/funnel/awareness)