Marvin wrote:please answer thanks
They determine which websites are most useful and relevant by using a complex algorithm (a mathematical process) that takes into account the 200+ different factors.
Google does not let people know what the factors are, however, through a combination of research, testing and experience, Google SEO consultant who well know what is the most important factor. For example, most SEO will agree that the following are all important ranking factors ...
The use of keywords
Site structure
Site speed
Time spent on site
The number of inbound links
Quality inbound links
This algorithm is designed and set-up by humans, however, the ratings are given to sites that are completely determined by the results of the algorithm. No manual intervention by humans to adjust the rating of certain web sites provided by the algorithm.