Evaluating Domain Authority: How to Use DA and PA Metrics for Smarter Acquisitions

I see the same mistake in my inbox every week — sellers anchoring their asking price to a DA 30 while the actual traffic graph is flat, and buyers walking away from a DA 18 because some competing listing scored a few points higher. The piece correctly notes that Moz's DA and PA are comparative metrics built from link data, not Google ranking factors, and treating them as gospel leads to bad deals on both sides of the table.

What the guide actually covers

Tycoonstory runs through how these scores are calculated, why Ahrefs, Semrush, and Majestic show different numbers, and where a DA PA checker fits into a sensible workflow. The use case they highlight is the one I actually use: pulling a list of 100 outreach or expired-domain prospects and trimming it to 20 before manual review. The score gets you through the first filter, but you still need to look at traffic, backlink quality, and editorial standards before any money moves. That sequencing is what separates a disciplined buyer from someone collecting domains that never monetize.

What this means for your portfolio

The guide hammers a point I push in every negotiation: a DA 60 site with weak content and little organic traffic is not worth more than a DA 40 with a clean history and real referral sources. Domain Authority lives at the domain level; Page Authority lives at the page level, and the two diverge more often than sellers admit. For flippers, this matters because the metrics you pitch to an end buyer are almost always DA plus a traffic number, and when those two don't line up, the buyer notices and your close rate drops. I've had deals die in the final hour because a buyer's own checker returned a PA five points lower than what I quoted — the negotiation never recovered.

Moz doesn't publish a public formula for DA — it's a machine-learning model fed link data — which means the score can shift when Moz updates its index, and you'll see domains re-priced overnight based on a change nobody caused. If you're holding inventory, log the authority scores at acquisition and re-check quarterly so you can explain any drift to a buyer before they ask. And if a seller is quoting a DA from a non-Moz tool, translate it before you compare it to your Moz data — different providers, different scales, and very different conclusions about what the domain is actually worth.