Common Data Service (CDS)

• … renamed to Microsoft Dataverse

Common Data Service lets you securely store and manage data that's used by business applications. Data within Common Data Service is stored within a set of entities. An entity is a set of records used to store data, similar to how a table stores data within a database.

• https://docs.microsoft.com/en-us/powerapps/maker/common-data-service/data-platform-intro

App makers can then use Power Apps to build rich applications using this data.