The document discusses Google's Quality Raters' Guidelines (QRG), which outline what Google considers to be a high-quality website. It notes that E-A-T (expertise, authoritativeness, and trustworthiness) is a major ranking factor, and that Google obtains information about a site's E-A-T from sources like Wikipedia, news articles, forum discussions and mentions on authoritative sites. It also discusses how ads that are deceptive, misleading or gross can negatively impact Google's perception of a site's quality. The document emphasizes the importance of the QRG and building external proof of E-A-T from other websites in order to rank well.