> ## 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.

# Cost per View Item List: Measure Collection Page Efficiency

> Track your cost per view item list event. Measure how efficiently your ad spend drives collection and product list page views on your Shopify store.

<Tip>
  Cost per View Item List measures the average ad spend required to drive one collection or product list page view on your store.
</Tip>

## Formula

<Info>
  **Cost per View Item List** = **Channel Spend** ÷ **View Item List Events**
</Info>

### Formula Components

| Metric                    | Definition                                                               |
| ------------------------- | ------------------------------------------------------------------------ |
| **Channel Spend**         | Total advertising spend across all connected ad platforms                |
| **View Item List Events** | Total collection or product list page views tracked by the Upstack pixel |

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

***

## Example

Your e-commerce store spent **\$2,500** on ads last week and drove **8,200 view item list events**:

| Metric                      | Value      |
| --------------------------- | ---------- |
| Channel Spend               | \$2,500    |
| View Item List Events       | 8,200      |
| **Cost per View Item List** | **\$0.30** |

A cost of \$0.30 per collection page view indicates efficient awareness-stage traffic from your ad campaigns.

***

## How It Works

View Item List events fire when visitors browse collection pages, category pages, or search results that display multiple products. Upstack tracks these events via the pixel and divides your total ad spend by the event count to calculate acquisition efficiency at the discovery stage of your funnel.

***

## When to Use

| Scenario                       | Action                                                                             |
| ------------------------------ | ---------------------------------------------------------------------------------- |
| Evaluating awareness campaigns | Compare cost per view item list across campaigns to find efficient traffic sources |
| Optimizing collection traffic  | Identify which ad creatives drive cheaper collection page visits                   |
| Budget allocation              | Shift spend toward channels with lower cost per view item list                     |
| Funnel benchmarking            | Track awareness-stage cost efficiency alongside engagement metrics                 |

***

## Related Metrics

| Metric                                                                              | Relationship                                                             |
| ----------------------------------------------------------------------------------- | ------------------------------------------------------------------------ |
| [Cost per Page View](/reference/metrics/funnel/awareness/cost-per-page-view)        | Broader awareness metric; Cost per View Item List is collection-specific |
| [Cost per View Content](/reference/metrics/funnel/engagement/cost-per-view-content) | Next funnel stage—measures cost to drive product detail page views       |
| [View Item Lists](/reference/metrics/funnel/awareness/view-item-list)               | Denominator—total collection page view events                            |

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