Explanation
The Dictionary uses concepts and synonyms to associate different words that have the same meaning with one another. A concept is simply a word and its synonyms, which the Dictionary treats as a single object.
Intelligent Search uses concepts to match words in both users' questions andin the knowledge base content based on their meaning. It also recognizes that some concepts are more important to users than others, and uses that information to prioritize answers within search results.
References:
https://docs.oracle.com/en/cloud/saas/service/18a/faaka/tuning-intelligent-search.html#c_About_Concepts_and_

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
Accessing Analytics Reports
Use the following procedure to access Knowledge Advanced Analytics reports.
To view the following reports, select Common, DataIntegration and the report.
To view the following reports, select OKCS and the report.
References:
Oracle Service Cloud, Knowledge Advanced Administration Guide, 18A, page 75