> ## 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.

# Select Item: Product Selection Events

> Track select item events to measure product engagement when visitors click products from lists, collections, or search results on your site.

<Tip>
  Select Item counts how many times visitors click or select a product from a list, collection, or search results page.
</Tip>

## Formula

<Info>
  **Select Item** = **COUNT** ( select\_item events )
</Info>

### Formula Components

| Metric                  | Definition                                                             |
| ----------------------- | ---------------------------------------------------------------------- |
| **select\_item events** | Individual product selection interactions tracked by the Upstack pixel |

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

***

## Example

Your Shopify store's homepage collection received **2,847 select item events** this week, indicating strong product discovery engagement.

| Page Type         | Select Items | Conversion to View Content |
| ----------------- | ------------ | -------------------------- |
| Collection Page   | 1,523        | 78%                        |
| Search Results    | 892          | 82%                        |
| Homepage Featured | 432          | 71%                        |

***

## How It Works

The Upstack pixel fires a select\_item event when a visitor clicks or taps on a product within a list context (collection pages, search results, featured products, or recommendations). This event captures product engagement before the visitor reaches the product detail page.

***

## When to Use

| Scenario                                | Action                                                              |
| --------------------------------------- | ------------------------------------------------------------------- |
| Measuring collection page effectiveness | Compare select item rates across different collection layouts       |
| Evaluating search result relevance      | Track how often search results lead to product clicks               |
| Optimizing homepage merchandising       | Analyze which featured product placements drive the most selections |
| Identifying navigation patterns         | Understand how visitors discover products before viewing details    |

***

## Related Metrics

| Metric                                                              | Relationship                                |
| ------------------------------------------------------------------- | ------------------------------------------- |
| [View Contents](/reference/metrics/funnel/engagement/view-contents) | Fires after user views product detail page  |
| [Add to Carts](/reference/metrics/funnel/engagement/add-to-carts)   | Next engagement step after viewing product  |
| [Page Views](/reference/metrics/funnel/awareness/page-views)        | Total page views including collection pages |

[See all Engagement metrics →](/reference/metrics/funnel/engagement)