# How Guidance for Deploying a Prebid Server on AWS works
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## Workflow of banner ads
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From [docs.prebid.org](https://docs.prebid.org/prebid-server/use-cases/pbs-pbjs.html).

 **Workflow diagram of banner ads** 

![workflow](http://docs.aws.amazon.com/solutions/latest/prebid-server-deployment-on-aws/images/workflow.png)


1.  `Prebid.js` is set up to run auctions for one or more bidders through `s2sConfig`.

1. Prebid Server parses the request and holds the auction.

1. The response, including the body of the winning creative(s), is sent back to the browser.

1.  `Prebid.js` passes ad server targeting variables to the page, which forwards it to the ad server.

1. When a header bidding ad wins, the ad server responds to the page with the [Prebid Universal Creative](https://github.com/prebid/prebid-universal-creative), which calls the render function in Prebid.js.

1. The render function displays the creative.