# User Acquisition attribution and data-sharing

> Review the app data you need to run a Unity User Acquisition campaign

To run an advertising campaign with Unity User Acquisition, you need to supply your campaign with data. All campaigns require attribution data to validate installs. Optimized campaign goals like Return on Ad Spend (ROAS) and Event optimization also need post-install event data. Refer to the following documentation to learn about the data your campaigns need and how to share it with Unity.

[Introduction to attribution and data sharing](/user-acquisition/data-sharing/intro-to-attribution-and-data-sharing.md): Learn the basics of the attribution and post-install event data you share with Unity to run ad campaigns.

[Campaign attribution](/user-acquisition/data-sharing/attribution/campaign-attribution.md): Learn about attribution with Unity User Acquisition, integrate your attribution links with the dashboard, test links with the Ad Testing app, and review attribution link parameters.

[App data-sharing](/user-acquisition/data-sharing/app-data-sharing.md): Learn about ad metrics and post-install event data and how this data works with your User Acquisition campaigns.

[Custom server-to-server integration](/user-acquisition/data-sharing/custom-integration/custom-server-integration.md): Implement a custom server integration with Unity to directly send install and post-install event data from your app's server