# Bid response

A buyer's reply to an auction request with a bid and required ad information, or a no-bid result.

A buyer's reply to an auction request with a bid and required ad information, or a no-bid result.

## An example

A buyer offers a price for an eligible placement and identifies its approved creative.

## Why it matters

A bid can be rejected for policy, format, deadline or price reasons before it can win.


## Related terms
- [Demand-side platform (DSP)](https://jolts.xyz/resources/glossary/demand-side-platform)
- [Inventory](https://jolts.xyz/resources/glossary/inventory)
- [Real-time bidding (RTB)](https://jolts.xyz/resources/glossary/real-time-bidding)
- [Supply-side platform (SSP)](https://jolts.xyz/resources/glossary/supply-side-platform)

## Next step

[Explore advertising](https://jolts.xyz/advertisers) or [monetize your AI app](https://jolts.xyz/publishers).