Domain authority measures how well the website will perform in SERPs and how competitive it is compared to other sites in its niche and page authority does the same but for an individual page. This is where your internal link strategy comes into play, as a page closer to the top of the hierarchy with multiple pages linking to it, will be given more importance and a higher PA than those further down.
About the Author: Chad Klingensmith
Chad is a Sr. SEO Strategist for Rio SEO. He has over 10 years of experience in the digital marketing vertical. He enjoys researching and applying cutting edge marketing strategies to help clients achieve optimal online visibility.