Page authority vs domain authority

The practical difference is speed. DA moves slowly because it aggregates every link to every page on your domain - one new link barely registers against a base of hundreds. PA on a single URL can jump several points from three good links.

They diverge in useful ways. A DA 65 news site can publish a page that sits at PA 12 because nothing links to it yet. A DA 20 personal blog can have one post at PA 45 because it got shared widely once. That second case is why site-wide averages mislead you.

Use DA to judge whether you can compete in a niche at all. Use PA to judge whether a specific page can win a specific query. If your PA beats the top result's PA and you still rank below it, the gap is content relevance, not links.

Neither number is a ranking factor. Google has stated it does not use a site-wide authority metric. These are third-party estimates that happen to correlate with rankings because links correlate with rankings.

RankPulse watches both daily and emails you only when one changes. Nothing moves, no email. That is the whole design - $9 a month for 3 domains plus 2 competitors each.