> ## 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.

# TikTok Audience: Reach and Impression Metrics

> Track TikTok ad reach metrics including impressions and CPM. Understand how many people see your TikTok ads and the cost to reach them.

Audience metrics measure how many times your TikTok ads are shown and the cost efficiency of reaching your audience.

<Info>
  **Data Source:** [TikTok Ads](/sources/tiktok)\
  **Metrics:** 2
</Info>

## Metrics in This Group

| Metric                                                                                         | Description                        | When to Use               |
| ---------------------------------------------------------------------------------------------- | ---------------------------------- | ------------------------- |
| [TikTok Impressions](/reference/metrics/advertising/tiktok/tiktok-audience/tiktok-impressions) | Number of times ads were displayed | Measure ad exposure       |
| [TikTok CPM](/reference/metrics/advertising/tiktok/tiktok-audience/tiktok-cpm)                 | Cost per 1,000 impressions         | Evaluate reach efficiency |

## How These Metrics Relate

* **TikTok Impressions** counts every time your ad appears on screen
* **TikTok CPM** = (TikTok Ad Spend ÷ TikTok Impressions) × 1,000

CPM depends on:

* [TikTok Ad Spend](/reference/metrics/advertising/tiktok/tiktok-spend/tiktok-spend) — total cost
* TikTok Impressions — total ad views

## Choosing the Right Metric

* **Awareness campaigns**: Use Impressions to measure total exposure
* **Budget efficiency**: Use CPM to compare cost of reach across campaigns
* **Audience targeting**: Lower CPM with maintained CTR indicates efficient targeting