For Experience Cloud customer users, Sharing Sets are the correct mechanism to provide access to records linked to their own Contact or Account. By creating a sharing set for the Case object, UC can ensure users see only the cases where they are the associated contact-even if the cases were created internally.
Option A (sharing rule) applies to internal users, not Experience users.
Option C (Public Read/Write) violates data security and exposes all customer cases.
Referenced Salesforce Materials:
Service Cloud Consultant Exam Guide - Service Cloud Solution Design Domain.
Salesforce Help: "Grant Record Access to Portal Users with Sharing Sets." Salesforce Experience Cloud Implementation Guide - Sharing Set Configuration.

Case Resolution Time is a critical KPI for understanding support center costs. It measures the average time taken to resolve customer cases, directly impacting labor costs and resource allocation. By monitoring and optimizing Case Resolution Time, executive management can identify efficiency improvements, manage staffing requirements more effectively, and ultimately reduce the cost of operating the customer support center.

When evaluating the use of macros to provide a consistent service experience, ensuring that the Lightning page layout includes the Run Macros action is a prerequisite. This enables agents to easily execute macros directly from the case record, streamlining repetitive tasks and enhancing service efficiency.

A common deflection technique to reduce contact center interactions is to recommend Knowledge articles to customers before they initiate a Chat session. This proactive approach can resolve customer queries without the need for direct agent interaction, improving efficiency and customer satisfaction by providing immediate solutions.

Comprehensive and Detailed
Web-to-Caseis a Salesforce feature that enables organizations to gather customer support requests directly from their company's website and automatically generate new cases. To minimize invalid case submissions, Web-to-Case forms can include validation rules and reCAPTCHA verification.
From Salesforce Help:
"Gather customer support requests directly from your company's website and automatically generate new cases with Web-to-Case."
-Turn On and Customize Web-to-Case
Implementing Web-to-Case with appropriate validation measures ensures that only valid and complete cases are submitted, enhancing the efficiency of the support process.