# Inventory

The advertising opportunities a publisher makes available under its placement rules.

The advertising opportunities a publisher makes available under its placement rules.

## An example

A news app offers eligible banner slots and a travel assistant offers sponsored recommendation cards.

## Why it matters

An available opportunity is not necessarily filled, viewable or billable.


## Related terms
- [Demand-side platform (DSP)](https://jolts.xyz/resources/glossary/demand-side-platform)
- [Programmatic media buying](https://jolts.xyz/resources/glossary/programmatic-media-buying)
- [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).