Master-detail relationship in Salesforce has these features:
- When a master object record is deleted, its associated detail records are also deleted.
- A detail record always assumes the sharing and security settings of its master record.
- The Owner field is not available on a detail object and is automatically set to the owner of its associated master record. Custom objects on the detail side of a master-detail relationship cannot have sharing rules, manual sharing, or queues, as these require an owner field.
- IIt is essential on the page layout of the detailed record.
