In their efforts to improve the digital experience of internet users, Google strives to continuously tweak its guidelines. The purpose is to encourage online businesses to publish quality content.
The title question is the shadow on the back of every web owners mind. The truth is, nobody knows exactly how search engines factor in metrics, and Google is keeping shtum about their methods of calculating PageRank (or its equivalent since PageRank hasn’t updated for a long time, and is not likely to do so again).
However, through a series of tests, research, experience and understanding Google Guidelines, SEO service providers can work out some of the key ingredients web owners need to boost PageRank.