Originally Posted by emanuelh

Peter, it seems that you've missed the first SEO lesson - relevance score is what the search engine measures for a web page versus a given search query. SERPs show results (web pages) by their descending order of their relevance scores. The relevance score calculated by Google's complex algorithm is a consolidated score, with no upper limit, of partial scores, some representing qualities of the page and some representing inbound links.

So before you teach us "the reality of what Google does" read at least the relevant page in Wikipedia, or better still read an introductory course to search technology.