Hi,
        What is the importance of DA and PA in SEO?

Regards,
Jeya vinoth.J

Domain Authority (DA) it means, how many quality backlinks have been created for your websites to other websites.
Page authority (PA)describe the probability that a specific page from your site will be found on the search engine. Higher PA means greater chance of your page showing up on the search engines.
Page authority and Domain authority. Both are very important.

Page Authority is a score (on a 100-point scale) developed by Moz that predicts how well a specific page will rank on search engines
Domain Authority is a score (on a 100-point scale) developed by Moz that predicts how well a website will rank on search engines.

Domain authority is the measure of strength and popularity of your domain in search engines. It is measured by Moz and your domain is ranked between 0 to100 depending on the popularity and trust. DA can be improved by good content update and also by building backlinks from other relevant domains.

Page Authority is a score (on a 100-point scale) developed by Moz that predicts how well a specific page will rank on search engines
Domain Authority is a score (on a 100-point scale) developed by Moz that predicts how well a website will rank on search engines.

DA : Domain Authority : How much your domain is powerful, generally an old domain gets more DA or your domain should be popular to increase the DA.
PA: Page Authority : This thing is totally depends on the visits of that particular page. If you have a large number of visitors on any particlular page, you will get high PA of that page.