A custom summary formula is a formula that calculates values from summary fields in reports such as sums, averages, counts, etc. Custom summary formulas can use functions such as PREVGROUPVAL which returns the value of a field from the previous row at the same grouping level. By using a custom summary formula with the PREVGROUPVAL function, an administrator can create a report to calculate the year-over-year change in the dollar amount of a company's opportunities by subtracting the amount from the previous year from the amount from the current year and dividing by the amount from the previous year. Reference: https://help.salesforce.com/s/articleView?id=sf.reports_builder_summary_formulas.htm&type=5 https://help.salesforce.com/s/articleView?id=sf.reports_builder_functions.htm&type=5

The PARENTGROUPVAL function is a formula function that returns the value of a parent group in a report. It can be used to compare values across different groupings and show relative performance. In this case, the administrator can use this function to show the lead source effectiveness for each country by calculating the percentage of leads from each lead source divided by the total number of leads for each country. Reference: https://help.salesforce.com/s/articleView?id=sf.reports_formulas_parentgroupval.htm&type=5

Email logs are files that provide information about email delivery and activity in your Salesforce org. Email logs contain details such as sender, recipient, subject, date, status, error code, and more for each email sent or received within a specified time range. You can use email logs to investigate issues with email delivery or performance in your org. In this case, you can use email logs to check if the status update emails were sent successfully or if there were any errors or failures. Reference: https://help.salesforce.com/s/articleView?id=sf.email_logs.htm&type=5 https://help.salesforce.com/s/articleView?id=sf.email_logs_format.htm&type=5

Process Builder and Flow Builder are tools that allow administrators to automate business processes in Salesforce without writing code. Process Builder and Flow Builder can perform actions such as creating records, updating fields, sending emails, posting to Chatter, invoking Apex classes, calling flows, etc.
To automate several updates to lead records and update unrelated records at Cloud Kicks, an administrator can use two options:
* B) Create a Process Builder that runs when a record is changed
Process Builder is a tool that allows administrators to create processes that consist of criteria nodes and action groups. Criteria nodes define the conditions that trigger the process and action groups define the actions that the process performs. Processes can run when a record is created or when a record is created or edited.
By creating a Process Builder that runs when a record is changed, an administrator can automate updates to lead records based on certain criteria and perform actions such as updating fields, sending emails, posting to Chatter, invoking Apex classes, calling flows, etc. References:
https://help.salesforce.com/s/articleView?id=sf.process_overview.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.process_considerations.htm&type=5
* C) Create a flow that runs when a record is created or updated
Flow Builder is a tool that allows administrators to create flows that consist of elements such as screens, assignments, decisions, loops, etc. Elements define the logic and user interface of the flow. Flows can run in different ways such as when a user clicks a button, when a record is updated by Process Builder, when an event occurs in the system (such as record creation), etc.