What is PA & DA ? Importance of PA,DA in SEO

Domain Authority :

Domain Authority represents how a website will perform in search engine rankings. Use Domain Authority when comparing one site to another or tracking the “strength” of your website over your competitor. DA is based off data from the Mozscape web index and includes link counts, MozRank and MozTrust scores, and many other factors.

Page Authority :

As Domain Authority measures the predictive ranking strength of entire domains or subdomains, Page Authority measures the strength of individual page. This metric is useful when doing research in the search results and determining which sites/pages may have more powerful/important link profiles than another. A website having good PA (30+) & DA (20+) will get indexed faster by Google Web-Master Tools compare to others. So definitely you will get some good traffic as well if your topic is relevant. You can simply pickup any website appearing in first page of Google Search with a high competition keyword and you will see High Trust Flow value (20+) and hence higher PA,DA. Trust Flow is another metric analyzed by MOZ and MajesticSEO. Also in Google PR updates we need to wait for a long time to get the updated score and its <10 ; so its hard to measure ups/downs. However PA/DA updates are very frequent and <100 which helps website owners getting results of observations quickly.

Here are the metrics on DA & PA :

• Domain/Page MozRank
• Domain/Page MozTrust
• Internal Equity-Passing Links
• External Equity-Passing Links
• Total Internal Links
• Total External Links
• Total Links
• Followed Linking Root Domains
• Total Linking Root Domains

To check DA/PA you can visit Opensiteexplorer DA/PA Comparison using Opensiteexplorer : [You can compare with 5 domains max.]

For Bulk PA/DA/Alexa rank check you can also use this free tool from BulkSEOTools.