Moz

What Moz is

Moz is an SEO platform best known for Domain Authority (DA) and Page Authority (PA) — proprietary 1-to-100 scores that predict how well a site or page might rank, plus a toolset for keyword research, link analysis, rank tracking, and site audits. The score matters because half the industry quotes DA in outreach and reporting, but it's Moz's model, not a number Google uses or recognizes.

The stakes: if you chase DA as if it were a Google ranking factor, you'll waste budget optimizing a vanity metric. Used correctly — as one relative benchmark among several — Moz's tools are solid. Used as gospel, DA quietly distorts link-building and competitor decisions.

A real job: sanity-checking a link prospect

You've got a guest-post opportunity and want to know if the site is worth the effort. Drop the domain into Moz's Link Explorer. You get DA, Spam Score, linking root domains, and the site's top pages by links. If DA is respectable, Spam Score is low, and the referring domains look like real editorial sites rather than a link farm, it's plausibly worth pursuing. If DA is high but Spam Score is elevated and the backlinks are all low-quality directories, the DA is inflated and you pass.

That's the honest use: DA as a fast relative filter, always read alongside Spam Score and an eyeball check of the actual referring domains. What you should never do is compare a DA-40 to a DA-45 and conclude one is meaningfully "better" — the model isn't precise enough for that, and it recalibrates over time, so your DA can move without you doing anything.

Moz's core metrics, and what each is really worth

Moz reports several proprietary numbers. Knowing which are predictive, which are directional, and which are noise keeps you from over-reading them.

How to use Moz, step by step

1. Start in Link Explorer: enter your domain to see DA, linking root domains, and your top pages by links. This is your baseline.
2. Run the same lookup on 3–4 competitors so DA is comparative. An absolute DA means little; the gap between you and rivals means a lot.
3. Open Keyword Explorer, enter your target terms, and read Difficulty alongside volume and organic CTR — not difficulty in isolation.
4. Use the "Spam Score" and "Discovered/Lost" link views to spot toxic patterns before they become a problem — see our guide on toxic backlinks and disavow.
5. Set up Moz Pro's rank tracking for your priority keywords and check it weekly, not hourly — daily SERP jitter is noise.
6. Run the Site Crawl audit to catch on-page and technical issues, then prioritize by traffic impact rather than fixing every flagged item.

Common mistakes (and the fix)

• Treating DA as a Google ranking factor. It isn't one, and Google has said so repeatedly. Fix: use DA as a relative benchmark against competitors, and read what Domain Authority actually is before you quote it.
• Panicking when DA drops. Moz recalibrates the model, so scores shift industry-wide without your site changing. Fix: watch DA relative to competitors over time, not as an absolute you must defend.
• Buying links from "high DA" sites. DA is gameable, and inflated-DA link networks exist. Fix: always cross-check Spam Score and inspect real referring domains before valuing a link.
• Reading Keyword Difficulty in a vacuum. A "hard" keyword with a weak SERP can still be winnable. Fix: open the live results and judge the actual pages ranking before trusting the score.
• Confusing DA with PA for a specific page. A strong domain can host a weak page. Fix: use Page Authority when the question is about one URL's chances.

FAQ

Does Google use Domain Authority?

No. DA is Moz's proprietary metric built to predict ranking. Google doesn't use it, doesn't recognize it, and has said there's no single "authority score" in its systems. It's an industry shorthand, useful only as a relative gauge.

What's a "good" Domain Authority?

There's no universal threshold — DA only means something compared to the sites you're competing against. In a low-competition niche a DA of 30 can dominate; in a cutthroat one, 60 barely gets you in the door. Benchmark against your actual SERP rivals.

Why did my DA go down without me doing anything?

Moz periodically recalibrates the model and the reference set of sites it scores against. When that happens, scores can shift across the whole index. Track your DA relative to competitors rather than as a fixed number.

Is Moz worth paying for?

If you'll use the link data, keyword research, and rank tracking regularly, yes. If you only want DA to quote in outreach, the free Link Explorer checks and MozBar cover most of that need without a subscription.

How is Moz's Spam Score calculated?

It estimates the percentage of sites with similar characteristics that were penalized or banned. A high score is a flag to investigate, not a verdict — plenty of legitimate sites trip individual signals.