This topic is being dealt with in chapter B of the free ebook "Beginner's Guide to SEO" (Single Page Version).
Chapter B has the title "How Search Engines Operate".
Topics of chapter B are
o Speed Bumps and Walls
o Measuring Popularity and Relevance
o Information Search Engines Can Trust
o The Anatomy of a HyperLink
o Keywords & Queries
o Sorting the Wheat from the Chaff
o Paid Placement and Secondary Sources in the Results
Please see article about the free ebook "Beginner's Guide to SEO" (Single Page Version) for reference and download link:
https://www.xing.com/net/ecomwriteracademic/questions-answer...