Explanation
Number of cases created by site by month and Number of cases closed by a self-service user are reports that the contact center manager should present to executive management to demonstrate the success of recent self-service initiatives. These reports can help measure the impact and effectiveness of self-service channels, such as public website and community, on reducing the case volume and increasing the customer satisfaction.
For example:
Number of cases created by site by month is a report that shows the distribution and trend of case creation across different sources, such as phone, email, web, or community, over time. This report can help evaluate the adoption and usage of self-service channels by customers, as well as compare the case volume and workload between different channels.
Number of cases closed by a self-service user is a report that shows the number and percentage of cases that were resolved by customers themselves without agent involvement. This report can help assess the quality and effectiveness of self-service resources, such as knowledge articles, FAQs, forums, or chatbots, as well as measure the cost savings and customer satisfaction from self-service resolution.
Verified References: [Service Cloud Consultant Certification Guide & Tips], Create Reports and Dashboards for Self-Service

Explanation
Adding conditional logic to the instructions and adding a formula block to the macro are solutions that a consultant can suggest to meet the agent's requirements of sending email to customers prior to violating an SLA based on three different SLA levels using macros. These solutions can help create macros that perform different actions based on different criteria, such as the SLA level of the case. For example:
Adding conditional logic to the instructions is a solution that involves using IF and ELSE statements to control when to execute certain actions in a macro. Conditional logic can be used to create a macro that checks the SLA level of the case and sends an appropriate email template based on the SLA level. For example, if the SLA level is Gold, send an email template with a high priority message; else if the SLA level is Silver, send an email template with a medium priority message; else, send an email template with a low priority message.
Adding a formula block to the macro is a solution that involves using formulas to calculate values or perform logic in a macro. Formula blocks can be used to create a macro that calculates the time remaining before the SLA violation and inserts it into the email body using quick text. For example, use a formula block to subtract the current date and time from the SLA violation date and time, and format the result as hours and minutes. Then use quick text to insert the result into the email body.
Verified References: [Service Cloud Consultant Certification Guide & Tips], Add Logic to Macros, Use Formulas in Macros