> ## 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 Spend: Total Advertising Investment

> Track total advertising spend across all connected platforms. Includes Blended Spend with formulas and optimization tips.

Spend metrics track total advertising investment across all connected ad platforms. Use these to understand total budget allocation and calculate blended efficiency metrics.

<Info>
  **Data Source:** Meta Ads, Google Ads, TikTok Ads (aggregated)\
  **Metrics:** 1
</Info>

## Metrics in This Group

| Metric                                                                                 | Description                                           | When to Use                          |
| -------------------------------------------------------------------------------------- | ----------------------------------------------------- | ------------------------------------ |
| [Blended Ad Spend](/reference/metrics/advertising/blended/blended-spend/blended-spend) | Total amount spent on advertising across all channels | Measure total advertising investment |

## How These Metrics Relate

Blended Spend is the foundation for all blended efficiency calculations. It aggregates spend from Meta, Google, TikTok, and any other connected advertising platforms.

## Choosing the Right Metric

* **Total budget tracking**: Use Blended Spend to see total advertising investment
* **Platform comparison**: Compare with [Meta Ad Spend](/reference/metrics/advertising/meta/meta-spend/meta-spend) or [Google Ad Spend](/reference/metrics/advertising/google/google-spend/google-spend) for platform breakdowns