> ## 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

## Introduction

Criteo's **Campaign API** allows retrieving information about the current configuration of your advertising Campaigns and Ad Sets.

This API allows searching for Campaigns based on filters, and updating the Campaigns' objectives and spend limits. It also allows searching for Ad Sets based on filters, to start and stop Ad Sets, and to update the Ad Sets' names, start and end dates, bid amounts, frequency capping, and other targeting controls.

<Info>
  **New Campaign Taxonomy**

  Criteo campaigns follow a three-tier structure:

  * Campaigns,
  * Ad Sets,
  * Ads.

  Your marketing objective and Campaign spend limit are specified at the **Campaign** level.\
  Targeting controls and bid targets are set at the **Ad Set** level.  Several Ad Sets can be linked to the same Campaign.\
  **Ads** are the actual media that is used to address the audience of a given Ad Set. There can be many Ads associated with a given Ad Set.
</Info>

## What's next

* [Campaign](/marketing-solutions/docs/campaign)
* [Ad Set](/marketing-solutions/docs/ad-set)
* [Display Multipliers](/marketing-solutions/docs/display-multipliers)
* [Category Bids](/marketing-solutions/docs/category-bids)