Domain Authority vs Page Authority: What's the Real Difference?

Somebody in an SEO Slack channel says "we need to boost our DA." Somebody else says "forget DA, look at PA." A third person just says "the metric doesn't even matter, Google doesn't use it." All three are sort of right, and that's exactly why this topic causes so much confusion.

Domain Authority and Page Authority get thrown around constantly in SEO conversations, often interchangeably, even though they measure two genuinely different things. If you've ever wondered why your homepage and your best blog post have completely different scores, or whether either number is worth chasing at all, here's the real answer.

What Is Domain Authority (DA)?

Domain Authority is a third-party metric, originally developed by Moz, that predicts how well an entire website is likely to rank in search results. It's scored on a scale of 1 to 100, and it's calculated primarily from the size and quality of a site's overall backlink profile.

A higher DA generally means a domain has accumulated more, and better, inbound links over time. Think of it as a whole-site reputation score. It looks at your domain as a single entity, not any specific page on it.

You can check any site's current score with a free Domain Authority Checker, or run several competitors at once through a Bulk Domain Authority Checker if you're benchmarking a whole niche.

What Is Page Authority (PA)?

Page Authority uses the same underlying scoring approach, also on a 1 to 100 scale, but it predicts the ranking potential of one specific URL rather than the entire domain.

A single high-authority site can still have individual pages with weak Page Authority, if those particular pages haven't earned many direct links themselves. Conversely, a single standout page on a lower-authority domain can occasionally outrank pages from far bigger, more established sites.

You can pull this number for any URL with a free Page Authority Checker, which also shows the domain's authority alongside it for quick context.

The Real Difference, in Plain English

The simplest way to think about it: Domain Authority scores the neighborhood. Page Authority scores the individual house.

A domain can be in a great neighborhood, with strong overall trust and a long link history, while one particular page on it is brand new, thin, or barely linked to. That page's Page Authority will likely lag behind the domain's overall DA, at least until it earns its own links and gets indexed properly.

The reverse also happens. A single exceptional piece of content, a widely cited study or a genuinely useful free tool, can rack up backlinks fast and post a Page Authority that outpaces what you'd expect from the rest of the site.

Do DA and PA Actually Affect Google Rankings?

Here's the part that surprises people: no, not directly. Google has stated multiple times that Domain Authority and Page Authority are not ranking factors in its algorithm. They're proprietary metrics built by Moz to approximate ranking potential, not signals Google itself calculates or consults.

So why does everyone still track them? Because they're a genuinely useful proxy. DA and PA correlate reasonably well with the kinds of things Google does actually care about, like backlink quantity, backlink quality, and overall site trust. When your DA climbs, it's usually because you're accumulating the same signals that help you rank, even though the DA number itself isn't the cause.

Treat both scores as a compass, not a destination. They tell you roughly where you stand relative to competitors, not exactly where you'll land in the search results.

DA and PA vs Other Authority Metrics

Moz isn't the only company with a score like this. You'll also run into MozRank, a simpler, older link-popularity metric on a 0 to 10 scale, along with equivalents from other SEO platforms using their own formulas and their own scales.

None of them are directly comparable to each other, since each company crawls the web differently and weighs links with its own algorithm. If you want the MozRank figure specifically, a free Moz Rank Checker will pull it for any domain.

The practical rule: pick one metric, from one provider, and track it consistently over time. Comparing your DA this month to a competitor's DR from a different tool last month tells you nothing useful.

How to Actually Improve Your Scores

Since both metrics are driven overwhelmingly by backlinks, improving them comes down to earning more, and better, links.

Start by understanding where you currently stand. Run a Backlink Checker on your own domain to see your existing referring domains and estimated backlink count, then run the same check on two or three direct competitors to see the gap.

From there, focus on link quality over volume. A handful of links from genuinely relevant, well-trusted sites will move your DA and PA further than a hundred low-quality directory links ever will. Publishing content worth linking to, tools, original data, or genuinely useful guides, tends to earn links naturally, which is far more sustainable than manual outreach alone.

For page-level authority specifically, internal linking matters more than people expect. Pointing links from your strongest existing pages toward a newer page can meaningfully lift that page's own authority, since some of the domain's overall link equity flows through internally, not just from external sites.

Common Myths That Won't Die

A few misconceptions about these metrics keep circulating, so it's worth clearing them up directly.

"A DA of 50 means I'll outrank a DA of 40." Not necessarily. DA is a relative, logarithmic scale, and it says nothing about topical relevance, on-page optimization, or search intent match for a specific query. A lower-DA site with a more relevant, better-optimized page can and does outrank higher-DA competitors constantly.

"Buying backlinks is the fastest way to raise DA." It can raise the number short-term, but low-quality or spammy links are increasingly filtered out or actively penalized, both by Moz's own algorithm updates and by Google separately. A DA boost built on paid or spammy links tends to be fragile and can drop just as fast as it rose.

"DA and PA update in real time." They don't. Moz recalculates these scores on its own periodic schedule, so a new backlink you just earned, or lost, won't necessarily show up in your score for a while. Don't panic over short-term fluctuations that might just be the metric catching up.

Which One Should You Actually Track?

If you're evaluating a whole site, for a partnership, a guest post opportunity, or a general competitive benchmark, Domain Authority is the more useful number.

If you're trying to understand why one specific page ranks and another doesn't, or you're deciding which of your existing pages deserves more internal links, Page Authority tells you far more.

Most experienced SEOs end up checking both together rather than picking one over the other, since a domain-level view without a page-level view (or the reverse) leaves out half the picture.

Neither number will get you a promotion on its own, and neither one is something Google will ever confirm or deny using. But as a rough, consistent way to track whether your SEO efforts are moving in the right direction, they've earned their place in the toolkit for a reason.