In the old days people really looked at “Google PageRank” for everything. Since Google started making it harder to get an accurate indication of Googles PageRank for a site, many people have begun using Domain Authority, and Page Authority as given out by “MOZ.com”. Domain and Page Authority are a similar type of ranking system that allow SEO people, and Website owners another complimentary tool to use in analyzing a Website for SEO. Moz.com has many tools, to help Website owners, and the SEO community to understand their current situation, and to help work towards getting better Search Engine Visibility. One of my favorite tools is their “MozBar”, which is a Browser toolbar. It can be found on the FREE tools section of their website. https://moz.com/tools