A Secure and Accessible Website.
Page Speed (Including Mobile Page Speed)
Mobile Friendliness.
Domain Age, URL, and Authority.
Optimized Content.
Technical SEO.
User Experience (RankBrain)
Links.
Google Page rank is based on quality content and back links. Back links are Links pointing to your website from another website. The more back links you have the higher your PR will be. A page with a higher Page Rank is deemed more important and is more likely to be listed above a page with a lower Page Rank. Page rank is the numerical value given to the site by calculating its links traffic and popularity.