Informed Webmaster

Google search quality guidelines were updated December 5. Search Engine Land has a review of the changes:

Google’s search quality evaluator guidelines were updated on Thursday, December 5. The revisions emphasized diversity, impartiality and pertained to language referring to users....

Google search quality guidelines update emphasizes users of diverse backgrounds

There is also a link in that article to the guidelines if you would like to read all 168 pages of them.

If you would like some insight into understanding Google's quality rater guidelines Search Engine Land has a summary of Jennifer Slegg's presentation at SMX West:

...At SMX West in San Jose, Jennifer Slegg, editor for The SEM Post, discussed how Google views the QRG, what quality raters do, and explained four of the guidelines’ most important themes for publishers....

A quick guide to understanding Google’s quality rater guidelines