> For the complete documentation index, see [llms.txt](https://help.citrusad.com/retail-media-interface/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.citrusad.com/retail-media-interface/integration/getting-started/overview.md).
# Overview
## What is Epsilon Retail Media?
Epsilon Retail Media is a scalable, auction-based advertising platform. Built for e-commerce retailers to easily integrate into, the API keeps you in full control of how, when, where and how often ads are shown.
In-situ ad image
Using first party sales data sourced directly from the retailer, Epsilon Retail Media delivers targeted, relevant and personalised ad content to the retailer's e-commerce server in the form of a product code every time a new page is loaded.
The Epsilon Retail Media API makes it possible for you (the retailer) to place advertisements on your e-commerce website. Once you have defined the advertising placements on your website, they become available for advertisers to bid on.
To explain it simply, Epsilon Retail Media allows advertisers to create advertising campaigns that are displayed on each retailer's e-commerce website. Advertisers bid to promote their products at the top of a retailer's website, and can track the performance of their products in real time.
Our user-friendly admin portal allows advertisers to select products, budgets, advertising strategies and search terms for the products they want to appear at the top of the retailer’s e-commerce page.
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