Page authority is a 1–100 score created by Moz that predicts how well a single URL is likely to rank in search results, based mainly on the quantity and quality of links pointing to that specific page. It is a third-party vendor metric. Google does not calculate it, does not receive it, and does not use it. No Google system has ever read your page authority score.
That is not a reason to ignore it. It is a reason to use it for the one job it does well — comparing pages against each other — and to stop using it as a report-card grade for your site.
What page authority actually is
Moz built PA as a machine-learning model trained to correlate with rankings. It ingests link data from Moz’s own web index — how many pages link to a URL, how many distinct domains, and how strong those linking pages are — and outputs a single number on a logarithmic scale.
Three properties follow from that design, and all three trip people up:
- It is logarithmic. Moving from 20 to 30 is achievable. Moving from 60 to 70 is roughly an order of magnitude harder. Equal-sized gains at the top require enormously more work.
- It is relative. The scale is normalized against the whole web index. If the web’s biggest sites gain links and you stand still, your score can drop while nothing about your page changed.
- It is link-driven. Content quality, page speed, user behavior, and topical relevance are largely outside the model. A brilliant page with no links scores low. A mediocre page with strong links scores high.
Its sibling metric, domain authority, does the same thing at the whole-domain level. Ahrefs’ Domain Rating and URL Rating, Semrush’s Authority Score, and Majestic’s Trust Flow are competing versions of the same idea, each computed on a different index. Their numbers are not interchangeable — a URL can score 34 with one vendor and 51 with another, and neither is wrong.
Why “not a Google ranking factor” matters practically
Google has said repeatedly that it uses no third-party authority metric. Its own link-based signals exist, but they are internal, unpublished, and not equivalent to any vendor score. When someone tells you a page “needs a PA of 40 to rank”, they are describing a correlation observed in a vendor’s dataset, not a threshold in Google’s algorithm.
Three real consequences:
- Optimizing the score is not a strategy. Buying links from high-PA pages inflates a vendor metric more reliably than it improves rankings — and vendors get better at filtering manipulated links every index update.
- Score drops are often index events, not penalties. A three-point fall usually means the vendor recrawled and recalibrated. Check whether your traffic and impressions actually moved before reacting.
- Low PA pages outrank high PA pages constantly. Relevance and intent match beat raw link strength on long-tail and specific queries every single day.
The one thing authority scores are genuinely good at
Comparative benchmarking on a single SERP. That is the legitimate use, and it is a good one.
Search your target keyword. Pull the URL-level authority score for all ten results. Then ignore the average and look at the weakest page on page one. If position nine has a URL-level score of 18 and four referring domains, that keyword is winnable with a genuinely better page and a modest link effort. If the weakest result sits at 55 with 300 referring domains, pick a different battle this quarter.
Benchmarking against the median is how people talk themselves out of winnable keywords. Google ranks ten results, not one. You only have to be better than the tenth.
How to raise a page’s authority — the honest version
Since the score is essentially a link model, only link-related work moves it.
- Earn links to the specific URL, not just the homepage. PA is page-level; homepage links help the domain metric far more than the target page.
- Prioritize distinct referring domains over raw link count. Fifteen links from one site are worth much less than five links from five sites.
- Use internal links deliberately. Internal links pass equity and are fully under your control. Pointing ten relevant existing pages at a new URL is the cheapest authority work available.
- Relevance beats raw strength. A link from a mid-sized site in your exact niche typically outperforms a stronger link from an unrelated one.
- Consolidate duplicates. Three thin pages on the same topic split their links three ways. Merging them and redirecting concentrates everything on one URL.
Expect slow movement. Vendor indexes refresh periodically, so a link earned today may not register for weeks. Links are necessary but not sufficient — a well-linked thin page still loses to a well-linked thorough one.
What to measure instead
Authority scores are inputs to a decision, never outcomes. The outcomes worth tracking:
- Impressions and average position in Google Search Console for the target URL. This is measured data about your own site, not a model.
- Referring domain count and growth rate for the page. Raw and honest — no black-box normalization.
- Position trend over four to six weeks. Daily swings of two or three places are ordinary noise. Never make a decision on one morning’s check.
- Conversions from organic sessions to that page. The only number attached to revenue.
SEO Rocket’s approach leans on this split deliberately: the site explorer reports domain-level authority, backlinks, referring domains, organic keywords, top pages, anchors, and spam flags for any domain as directional research, while rank tracking connects Google Search Console and GA4 alongside third-party estimates so you can always see measured data next to modeled data.
Common misreadings to avoid
A few patterns come up constantly in audits.
“Our page authority went up but traffic didn’t.” Expected. The score reflects links, which are one input among many. If intent match or content depth is the problem, more links will not fix it.
“A competitor with lower authority outranks us.” Also expected, and usually diagnostic. Look at freshness, intent match, and internal linking before you look at links.
“We need PA 30 before we can rank.” There is no such threshold. There are only ten results, and you need to beat the weakest one.
“Two tools give different scores, so one is broken.” Neither is. They crawl different portions of the web with different models. Pick one vendor and stay with it so your trend lines mean something.
How to use the number this week
Do three things. Pull URL-level authority for your five most important target keywords’ page-one results and note the weakest competitor on each. Point internal links from your existing relevant pages at whichever of your URLs sits closest to breaking into the top ten. Then open Search Console and record current impressions and average position for those URLs so you have a real baseline.
Page authority is a compass, not a scoreboard. Use it to choose which fights are winnable, then measure the fight itself with data Google actually gives you.
