Google’s 200 Search Ranking Factors (Infographic)
Google has confirmed that they use approximately 200 ranking signals in their algorithm. However, they have never publicly listed them all. It is the complex, top-secret formula that determines how high (or low) a site or web page ranks in organic search results.
Brian Dean of Backlinko has several blog entries and forums analyzed and identified 200 factors that are responsible for a successful ranking in Google. The results were summarized in a very long infographic.