PR is merely a way for Google to evaluate the reliability and quality of every website in its category, based on how often gain access to on the Internet. A different approach to a more technical definition of PR is an algorithm analyses the link. DA stands from Domain Authority. It is an index by MOZ set out to measure the degree of credibility and strength of a domain name (Domain).PA stands from Page Authority: this is also an index by MOZ set out to measure the strength as well as the degree of reputation (trust) of each Page individually. So you're in Page that you view this index, it is the index of the page.
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