DA Stand for Domain Authority .
PA for Page Authority.
Domain Authority (DA) is a developed by Moz.
Score ranges from 0-100 on 100 point logarithmic scale . higher number means greater ability to rank. Website will rank on search engine result pages.
The domain authority is created through various SEO factors. Some examples are:
Quantity and value of backlinks to the website
Building and user-friendliness of the website
The better the site is optimized for SEO, the higher the score of the site.
Page Authority (PA) is a score developed by Moz
Page authority considers factor like- Domain authority.
Also based on the link profile - other seo factor approximately 40+.
To Improve page authority try to get external links from other high authority websites.
Page Authority scores range from one to 100, with higher scores corresponding to a greater ability to rank