Domain Rating is an Ahrefs metric. Google does not use it. What Google uses is a far more nuanced assessment of a site’s authority within specific topic areas, which is what SEO practitioners mean when they talk about topical authority.
The distinction matters because the strategies that build DR and the strategies that build topical authority overlap significantly but are not identical. A site can have a high DR with weak topical authority in a specific niche, and struggle to rank for competitive keywords in that niche as a result.
What Is Topical Authority?
Topical authority is the degree to which Google’s algorithms regard your site as an expert source on a specific subject area. It is built through a combination of content coverage (how comprehensively you cover the topic), content quality (how genuinely useful and accurate that coverage is), and external signals (whether other authoritative sites in the topic area link to you).
A site that publishes 200 high-quality articles covering every aspect of project management, earns links from productivity publications and software review sites, and has those articles cited by other project management resources has strong topical authority in that space. Google is confident that this site is a credible expert source on project management topics.
How Google Measures Topical Authority
Google has not published a specific topical authority algorithm, but the signals they weight are well documented through their helpful content guidelines and E-E-A-T framework (Experience, Expertise, Authoritativeness, Trustworthiness). Each of these signals is topic-specific, not site-wide.
A medical site with expert authors, cited research, and links from healthcare institutions has high topical authority in healthcare. The same site publishing articles about cryptocurrency would not carry that authority to the new topic area. Google evaluates authority at the topic level, not just the domain level.
Why Topical Authority Is Increasingly Important in 2026
Google’s Helpful Content System, introduced through a series of updates from 2022 onwards, explicitly targets content produced for SEO purposes that lacks genuine topical depth. Sites that produce thin content across many topics to capture search traffic have seen significant ranking declines regardless of their Domain Rating.
Meanwhile, sites with deep, expert-level content in specific niches have seen improvements. The algorithm is increasingly able to distinguish between a site that has genuine expertise in a topic area and a site that is covering that topic purely for traffic.
Building Topical Authority Through Link Building
Links from topically relevant publishers contribute to topical authority in a way that links from general high-DR sites do not. A guest post on a SaaS-focused publication contributes to your topical authority in the SaaS space. The same DR link from a generic news aggregator contributes less to topical authority, even though both carry the same domain-level authority signal.
This is why topic relevance is a core criterion for every placement we make at White Hat Works. Our guest posting service places content on niche-relevant publishers, not just high-DR sites. Our niche edits are inserted into topically relevant content, not just high-authority pages.
The Content Side of Topical Authority
Links alone cannot build topical authority. Content coverage is equally important. A site with strong links but thin content coverage will not be regarded as a topical authority regardless of its DR. The link building and content strategy need to work together.
For a site targeting the link building space, topical authority requires comprehensive coverage of all relevant subtopics: editorial link building, guest posting, niche edits, digital PR, anchor text strategy, link velocity, DR analysis, white-label link building, and so on. Links from other SEO and digital marketing publications reinforce that coverage.
Practical Implications for Your SEO Strategy
Do not optimise purely for DR improvements. Measure topical authority through keyword coverage: how many of the relevant keywords in your niche does your site rank for, at what positions, and how is that changing over time? This is a better indicator of real authority growth than DR alone.
When building links, prioritise relevance alongside authority. A DR 45 link from a publisher that exclusively covers your industry is worth more for topical authority than a DR 65 link from a general publisher that occasionally covers your topics.
White Hat Works can help you build both the link profile and the topical authority signals that Google weights in 2026. Explore our link building services or get in touch to discuss a campaign designed around your specific topical authority goals.