Domain Authority [DA] is a search engine ranking score that contains how a good website rank in search engine result pages [SERP]. A domain authority score decides from 1 to 100, with higher scores domain to a greater priority and ability to rank in Search Engine Result Pages [SERP].
Domain authority is calculated by evaluatng multple factors, including linking root domains and number of total links, into a single Domain Authority score. This score can then be used when comparing websites or tracking the ranking power strength of website over tme.