The Array of Objects (AoO) is a user attribute type that allows you to store multiple structured records under a single attribute.
Users may have multiple related records over time rather than a single value. For example, a user may have multiple:
Subscriptions
Credit cards or loans
Insurance policies
Pets
Each record is stored as a separate object within the same attribute.
Object keys define the fields inside each record and can store structured information such as status, price, activation date, or renewal date.
The Array of Objects helps manage lifecycle-based data in a structured, queryable way, making it easier to use for segmentation and personalization.
To learn more about the Array of Objects, get started with How the Array of Objects Powers Campaigns.