What type of custom attribute is best suited for storing lists of information about users?

The best option for storing lists of information about users is represented by array attributes. Arrays specifically allow for the storage of multiple values under a single attribute, enabling you to maintain a collection of items that can be easily manipulated, accessed, and iterated over.

In scenarios where user data may include several related items, such as multiple interests, skills, or subscriptions, utilizing an array allows for efficient storage and retrieval of this information in a structured format. Each item in the array can be of the same type or a mix various types, providing flexibility in how the data is organized and accessed.

While string attributes can hold textual information, they are limited to single values, and using them for lists would require concatenating values into a single string, complicating retrieval and manipulation. JSON attributes can also represent structured data including an array, but they are more suited for hierarchical data rather than simple lists, which makes array attributes more straightforward for list-like structures. Boolean attributes are designed solely for true/false values, making them unsuitable for any scenario involving multiple items or lists.