The Shared Storage API enables companies to store data from past interactions across multiple sites securely in the browser. Privacy controls ensure that only the relevant company has access to the data. It can help publishers, advertisers, and ad tech providers in several ways:
- Gain insights through cross-site aggregated measurement: Write variables to Shared Storage and read aggregated measurement data via Private Aggregation. This allows you to measure things like reach, frequency, and custom attribution in a privacy-preserving way. Cross-site aggregated measurement helps you understand how your campaigns are performing and equips you to make better decisions about your ad spending.
- Deliver customized ad experiences with cross-site content selection: Write variables to Shared Storage and implement logic to select content URLs to be rendered with cross-site data. This means you can tailor ad experiences based on information gathered across multiple websites, such as previous interactions or user preferences, and unlocks possibilities like creative rotation, custom ad experiences, and A/B testing.
Read about other use cases compatible with Shared Storage or, for a more technical overview on the Shared Storage API, refer to the developer documentation.