> ## 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.

# Blended Initiate Checkouts: Cross-Platform Checkout Intent

> Track checkout initiations attributed to your ads across Meta, Google, and TikTok. Measure purchase intent driven by cross-platform advertising.

<Tip>
  Blended Initiate Checkouts measures the total number of checkout starts attributed to your ads across all connected advertising platforms.
</Tip>

## Formula

<Info>
  **Blended Initiate Checkouts** = **SUM** ( Checkout Initiations ) **ACROSS** All Channels
</Info>

### Formula Components

| Metric                                                                                                              | Definition                                    |
| ------------------------------------------------------------------------------------------------------------------- | --------------------------------------------- |
| [**Meta Initiate Checkouts**](/reference/metrics/advertising/meta/meta-conversions/meta-initiate-checkouts)         | Checkout initiations attributed to Meta ads   |
| [**Google Initiate Checkouts**](/reference/metrics/advertising/google/google-conversions/google-initiate-checkouts) | Checkout initiations attributed to Google ads |
| [**TikTok Initiate Checkouts**](/reference/metrics/advertising/tiktok/tiktok-conversions/tiktok-initiate-checkouts) | Checkout initiations attributed to TikTok ads |

| Metadata        |                                                                                                     |
| --------------- | --------------------------------------------------------------------------------------------------- |
| **Type**        | Number                                                                                              |
| **Data Source** | [Meta Ads](/sources/facebook-ads), [Google Ads](/sources/google-ads), [TikTok Ads](/sources/tiktok) |
| **Aggregation** | Sum                                                                                                 |

***

## Example

A DTC brand running campaigns across three platforms sees **1,892 checkout starts** for the week:

| Platform          | Initiate Checkouts | % of Total |
| ----------------- | ------------------ | ---------- |
| Meta Ads          | 1,047              | 55.3%      |
| Google Ads        | 568                | 30.0%      |
| TikTok Ads        | 277                | 14.7%      |
| **Blended Total** | **1,892**          | **100%**   |

***

## How It Works

Blended Initiate Checkouts aggregates checkout initiation events reported by each advertising platform. When a user clicks an ad and starts the checkout process within the attribution window, that platform counts the event. This metric sums those events across all connected platforms for a unified view of purchase intent.

***

## When to Use

| Scenario                                 | Action                                           |
| ---------------------------------------- | ------------------------------------------------ |
| Measuring cross-platform purchase intent | Compare checkout starts to completed purchases   |
| Identifying checkout abandonment         | Track ratio of initiates to purchases            |
| Optimizing for high-intent users         | Use to measure bottom-funnel ad effectiveness    |
| Budgeting across platforms               | Identify which platforms drive checkout activity |

***

## Related Metrics

| Metric                                                                                                                              | Relationship                                 |
| ----------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------- |
| [Blended Add to Carts](/reference/metrics/advertising/blended/blended-conversions/blended-add-to-carts)                             | Earlier funnel stage — cart additions        |
| [Blended Purchases](/reference/metrics/advertising/blended/blended-conversions/blended-purchases)                                   | Next funnel stage — completed orders         |
| [Blended Cost per Initiate Checkout](/reference/metrics/advertising/blended/blended-conversions/blended-cost-per-initiate-checkout) | Efficiency metric — spend per checkout start |

[See all Blended Conversions metrics →](/reference/metrics/advertising/blended/blended-conversions)