They are from the 90's, however for the most part they still signify importance of the page being cited. Deviating from links to mainly on-page factors makes it

They are from the 90's, however for the most part they still signify importance of the page being cited. Deviating from links to mainly on-page factors makes it easy for new search engines to compete with Google. The results can also be manipulated much more frequently than when you need high authority links to rank on top.