Dynamic pool is a collection of fields and field groups that you can use as dynamic fields. You don't share fields between dynamic pools. You can create multiple dynamic pools based on your use case and add relevant fields and field groups to each pool.
For example, you can create two dynamic pools for consumer business entities, such as Product Data and Supplier Data. You can add basic fields to a dynamic pool, but you can't add smart fields. To use the fields in a pool as dynamic fields, configure a dynamic field definitions attribute to refer to the dynamic pool. For more information about the dynamic field definitions attribute, see
Add a dynamic field definitions attribute.