> 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/overview.md). # Overview RTB is a way of buying and selling ads through real-time auctions, meaning transactions are made in the time it takes to load a webpage around 100 ms. This specification contains a detailed explanation of a real-time bidding interface. Not all objects are required, and each object may contain a number of optional parameters. To assist a first-time reader of the specification, we have indicated which fields are essential to support a minimum viable real-time bidding interface for Native Ads. A minimal viable interface should include the required parameters. Optional parameters may be included to ensure the parties derive maximum value.