What is a Sharing Descriptor used for in Salesforce?

A Sharing Descriptor in Salesforce is fundamental for defining and controlling how access rights to records are managed and represented. It outlines which users or groups can view, edit, or share specific records based on the organization's sharing settings. This enhances data security and ensures that sensitive information is only accessible to authorized personnel.

By leveraging Sharing Descriptors, Salesforce administrators can fine-tune the visibility of records for different users and roles within the organization. This is particularly important in environments where data confidentiality and compliance are critical. The Sharing Descriptor effectively maps the sharing rules and access permissions, allowing users to collaborate while maintaining control over data privacy and integrity.

The other options, while related to user management and security in Salesforce, do not specifically address the role of Sharing Descriptors in representing access rights to records, which is their primary function.