Explanation
The answers your customers search for are sorted so the ones that are expected to be most useful are listed first. Three techniques are used to automatically rank and organize answers.
References:
https://docs.oracle.com/cloud/november2016/servicecs_gs/FACAI/AdministeringAccessibility-4.htm

Explanation
Answer variables are predefined shortcuts for entering information into an answer instead of a long string of text. When an answer displays on the customer portal, the variable is replaced with whatever value was specified by your administrator.
Variables are also helpful to use for information that may change. When your administrator changes the value of the variable, all answers containing that variable will also change. Contact your administrator for a list of variables defined for your application. For example, if your administrator added a variable for a support email address at your organization called "contact," you could insert the variable for the email address in the answer, such as $contact. If the email address changes, all answers containing the contact variable are updated.
References:
https://docs.oracle.com/cloud/november2016/servicecs_gs/FAABU/_BUIGuide-9.htm

Explanation
When you tune a question you are adding or changing objects in the Intelligent Search Dictionary. The Dictionary is an Intelligent Search component that contains:
References:
https://docs.oracle.com/cloud/may2017/servicecs_gs/FAAKA/Optimizing_Intelligent_Search.htm#FAAKAth_T

Explanation
The date_diff() function returns the number of seconds occurring between two dates.

Explanation
When you use the report and click a drill-down link on the first level of the report, the second output levelknows to display only information related to the queue in the row you clicked. For more complex reports, the drill-down filter can be changed.
References:
https://docs.oracle.com/cloud/february2017/servicecs_gs/FAMUG/_analytics.htm#FAMUGth_Analytics