> For the complete documentation index, see [llms.txt](https://help.adgebra.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.adgebra.co/getting-started/publish-your-docs-10/terminology.md).

# Terminology

The following terms are used throughout this document specifically in the context of the RTB Interface and this specification.

**Term Definition**

> **RTB** - Bidding for individual impressions in real-time (i.e., while a consumer is waiting).
>
> **Exchange** - A service that conducts an auction among bidders per impression.
>
> **Bidder - An entity that competes in real-time auctions to acquire impressions** 
>
> **Seat** - An entity that wishes to obtain impressions and uses bidders to act on their behalf.
>
> **Publisher** - An entity that operates one or more sites.
>
> **Site** - Ad-supported content including web and applications unless otherwise specified.

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