What type of objects can be accessed via sharing sets?

Sharing sets are a feature in Salesforce that allows users to share records with external users in Experience Cloud sites. The types of objects that can be accessed through sharing sets are specifically those that are part of the sales and service cloud offerings, namely Account, Asset, Case, and Custom Objects.

Accounts can be shared because they are foundational to customer relationships and business processes. Assets and Cases are also critical for managing customer interactions and support scenarios, where having the right information accessible to the right external users can enhance user experience and service.

Custom objects are included because they may be tailored to specific business needs, thus allowing organizations to extend functionality within their Salesforce instance. This flexibility is essential for businesses that leverage unique data models.

In summary, the reason this answer is correct is that it encompasses a comprehensive range of objects relevant to the functionality of sharing sets in Experience Cloud, enabling external users to interact with a mixture of standard and customized data to deliver an effective experience.