Understanding domain authority and page authority

Search engines assess websites using signals that extend beyond keywords and content quality. Links from other websites remain an important part of this process, giving established publishers greater visibility than a new site with almost no online references. Two widely used terms in this discussion are domain authority and page authority, but they describe third-party estimates rather than direct Google rankings.

This beginner’s guide to understanding domain authority and page authority explains what each score represents, how link profiles affect them, and how to use them alongside real search data. It also covers the Australian market, including local domains, regional audiences and opportunities to earn relevant mentions from trusted organisations.

What the two authority scores mean

Domain authority is a domain-wide metric that estimates how competitive a website may be in search results. It is calculated from the link profile associated with the root domain and is intended to provide a broad indication of a site’s perceived strength. A higher score generally suggests that the domain has accumulated more relevant and established external references.

Page authority performs a similar role for an individual URL. Instead of summarising a whole domain, it estimates the strength of a particular page’s link profile. This makes it useful for comparing a product page, article or local service page with competing URLs rather than comparing entire websites.

Both scores usually range from 1 to 100. They are relative indicators produced by proprietary models, not percentages, grades supplied by Google or guarantees of traffic. A page can have stronger page authority than its parent domain’s domain authority, and a strong domain can still contain weak pages that need attention.

How link profiles influence authority

The starting point for both metrics is the backlink profile: the backlinks pointing to a domain or URL and the referring domains responsible for them. Ten links from ten unrelated websites may create a different signal from one link from a respected industry publication. Referring domain diversity therefore matters, particularly when those sites are relevant to the subject.

Link quality is assessed through factors such as topical relevance, editorial placement, site reputation and possible artificial patterns. Moz and other software providers examine hundreds of signals, but no tool can judge every backlink perfectly. A relevant link from an Australian government, university or established news outlet generally carries more context than a network of low-quality directories.

Anchor text is another part of the link profile. Natural links may use a brand name, URL, partial phrase or descriptive anchor. Repeatedly forcing the same commercial keywords into anchor text can look unnatural and carries a risk of triggering link-quality safeguards. Internal links also help search engines discover pages and distribute authority within a site, making clear navigation and useful contextual links worthwhile.

Why Google does not use authority scores

Moz developed domain authority and page authority as diagnostic tools. Google does not use either score directly when selecting search results, and a high value will not automatically produce a higher position. Competitors using the same tools may have completely different visibility for the same search phrase.

Google evaluates signals such as content usefulness, keyword relevance, mobile performance, crawling, indexing, backlinks and the reliability of a site’s references. Its systems also assess spam and manipulative link patterns. Domain authority can loosely resemble elements of Google’s link-based evaluation, but the calculations are independent and should never be treated as a direct substitute for a ranking factor.

Practical search data provides a clearer picture. Google Search Console reveals impressions, clicks, average positions, indexed pages and external links found for a property. Bing Webmaster Tools offers another source of performance and index information. Authority scores work best for choosing pages to audit and comparing competitors, while Search Console shows whether those changes are producing genuine visibility.

Checking your site's authority in Australia

Begin with a domain-level audit, then examine the URLs that matter most. Moz Link Explorer can display domain authority, page authority, referring domains and individual backlinks. Ahrefs and Semrush provide their own authority and domain-strength measures, which are useful but should not be compared numerically with Moz scores as though they use the same scale.

Australian sites often use a .com.au or .au domain, and both can be appropriate choices. A country-code domain helps communicate an Australian focus, but it is not an automatic ranking advantage. Verify the correct domain property in Google Search Console, check that important service pages are indexed, and keep the domain visible in local listings such as Google Business Profile.

Local context can influence which links and content deserve attention. Trusted references might come from a council website, a university with an .edu.au domain, an Australian news publication or established organisations such as NAB, CBA, Telstra or Australia Post. For a small business in Melbourne, Brisbane, Perth or Adelaide, links from relevant local associations can be more valuable than generic backlinks from unrelated overseas websites.

Australian audiences also search with distinctly local language and locations, including phrases such as “near me”, “arvo” or a particular suburb. Check whether pages address those needs, load properly on phones and remain usable across regional connections and varying mobile network conditions. Strong access through the NBN in some areas does not eliminate the need for a fast experience on mobile devices.

Building authority safely over time

Authority grows when a website becomes useful enough for other people and organisations to reference. Original research, practical tools, detailed guides and clear explanations of Australian regulations can attract natural links. Updating an existing article with accurate information can also make it more valuable, although changing the words alone will not cause authority scores to rise.

Link-building activities should focus on genuine relationships. Consider contributing expertise to relevant Australian publications, correcting outdated industry references, participating in local events or creating resources that local organisations can share. Internal linking should guide visitors and crawlers towards related content, while sensible site structure keeps valuable pages easy to reach.

Avoid link farms, private blog networks, reciprocal-link schemes and bulk directory submissions. Purchased links may violate search-engine guidelines; when a link is paid or sponsored, it should use appropriate link attributes. Track referring domains, indexed pages, search impressions, clicks, average position and conversions over several months. This combination shows whether your authority is improving and whether that improvement is helping the right Australian visitors.

Start with one important Australian page and record its domain authority, page authority, backlink profile, Search Console performance and current competitors. Compare it with two or three similar pages, identify the strongest opportunities, and prioritise useful content, relevant links and clear internal navigation. Make one measurable change at a time, review the results and repeat the process as the site earns more recognition.