They analyze, in practice, the effects of a given optimization action on positioning. , click-through rate on the serp and time spent on the page are some likely ranking factors identified in the studies. In addition to these analyses, some statements from google itself and its employees also help to decipher the ranking factors.
This is the case with the google and google webmasters architect data channels on youtube, full of guidance and tips about the search system. A google document that should be a guide for seo professionals is the search quality rater guidelines. This document provides google's guidelines for evaluating the quality of search results by external evaluators, which we mentioned before.
Therefore, they also serve as guides for optimization strategies, as they show google's criteria for determining what a quality page is. Useful answers until a few years ago, google's search systems carried out their work in this cycle of crawling, indexing and ranking. However, in , the search engine began a movement that changed the way it displayed search results, which would add a new stage to this process.