Who is the creator of domain authority and page authority any why its so important?

[maryjane]

[Jazz]

I assume you are talking about "Google Page Rank". That is a rank between 1-10 that google gives web pages which is a general guide to the amount of authority that page has. The more authority your page has the more likely it is to show up a lot in search engines. A couple years ago people would set up link building strategies and obsess about Page Rank or PR but now the algorithms used to determine where you site shows up for terms is not so straight forward and I find people don't care about PR as much.

[Robert]

Domain Authority and Page Authority is a calculation based on Google algorithm, and the company behind it is moz.com ,

As its said that its a calculation of all Google Algorithm so the ratings it give is like a reference for other bloggers for link building.

http://www.bloggingsaga.com/increase-dom...y-quickly/ here is a nice description on what domain authority means...