of a website is the amount collected by search engines crawl the page volume and quality to decide.
A, from the technical perspective, analysis page URL, HTML, heads;
(a) search engines
two, the overall ranking of website:
is a website ranking and aggregation page ranking consists of a single page.
(a) a single page ranking:
search engines can be judged by the analysis of the log file retention time spider crawl the site total residence time and grab a single page, so that we can be calculated by a formula.