A customer wants to implement a customer community.

Org-wide defaults for external users determine the baseline level of access that guest users and authenticated community users have to records they do not own. Setting them to Hidden for everything means that external users cannot see any records by default, unless they are explicitly shared with them. Sharing sets are used to grant access to records that are associated with a specific user or profile in a community. By setting up sharing sets, the authenticated community users can access their own Cases, Applications, and Accounts, but not those of other users. References: https://help.salesforce.com/s/articleVi ew?id=psc_admin_concept_psc_overview.htm&type=5&language=en_US https://developer.salesforce.com/docs/atlas.en-us.psc_api.meta/psc_api/api_psc_overv iew.htm