> ## Documentation Index
> Fetch the complete documentation index at: https://developers.criteo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Campaigns

> This page is an overview of how to get started with Campaigns

## The Campaign Level

<Frame caption="Campaigns are created at the account level and are composed of one or several Line Items.">
  <img src="https://mintcdn.com/criteo-e1682996/xLJjp01XGpYNB6pV/images/retail-media/v2025.10/docs/1f0bfaf-l2-campaign.png?fit=max&auto=format&n=xLJjp01XGpYNB6pV&q=85&s=9b81208d7b72190f5f7f28330fce76e6" alt="Campaigns are created at the account level and are composed of one or several Line Items." width="1886" height="1015" data-path="images/retail-media/v2025.10/docs/1f0bfaf-l2-campaign.png" />
</Frame>

***

## Open Auction Campaigns

An Open Auction campaign operates on a first-price auction model using cost-per-click (CPC). Advertisers set their bid for each shopper interaction with their ad, competing in an inventory auction to secure ad placements.

<Info>
  **Things to Know**

  * A campaign represents a marketing objective and includes line items.
  * Campaigns can contain line items across multiple brands and retailers.
  * Campaigns offer optional controls for budgeting and attribution windows.
  * Budgets can also be managed at the line item level.
  * Various \[reports]\(doc:demand-side-analytics-get-started qu are available to track and measure campaign performance.
  * Accounts are capped at 100,000 active campaigns.
  * Currently, only Open Auction campaigns are supported via the API.
</Info>

***

## Quick Start

1. **Select products** to promote from your account catalog.

2. **Create a campaign** to define your marketing objective.

3. **Create a line item** within the campaign.

4. **Add products to the line item** to specify what you are promoting.

5. **Assign the campaign** to an account balance to manage spending.

6. **Activate your line item** to start running the campaign!

## What's next

* [Campaigns Endpoints](/retail-media/v2025.10/docs/campaigns-endpoints)