
Explanation:
Box 1: Standard Dataverse table
Standard: Several standard tables, also known as out-of-box tables, are included with a Dataverse environment. Account, business unit, contact, task, and user tables are examples of standard tables in Dataverse. Most of the standard tables included with Dataverse can be customized.
Box 2: Custom Dataverse table
Custom: Custom tables are unmanaged tables that are either imported from an unmanaged solution or are new tables created directly in the Dataverse environment.
Reference:
https://docs.microsoft.com/en-us/power-apps/maker/data-platform/types-of-entities