What topical authority is and why it matters for SEO

Google increasingly favours not only a site's technical quality but the expertise, credibility and consistency of content on a subject. And it is exactly here that the term topical authority comes onto the scene. It is one of the key factors deciding whether your site appears in the top places in search results.  In essence it is about how far Google (and users) consider your site an authority in a particular area. The higher your topical authority, the greater the chance Google's algorithm will favour you over less trustworthy pages. Search engines keep refining their algorithms and what interests users is above all relevant, interesting content. It is no longer enough to be an "all-knowing" site with a wide scope. Quite the opposite: success in SEO ever more favours those who specialise, cover selected subjects systematically and build trust through expert content. This article will explain to you clearly what topical authority means, why it matters and how it can be built systematically.

What the term topical authority means

Topical authority represents the degree of a website's credibility and expertise in a particular subject. This credibility is perceived not only by search algorithms but by the site's visitors themselves. A site focusing exclusively on one subject, for instance healthy nutrition, is much more likely to be marked with a higher topical authority score in that area than a general magazine covering a wide spectrum of subjects.

The significance of topical authority for search engine optimisation (SEO) is considerable. Sites with high topical authority in a given subject rank in higher positions in search results. Besides that they build trust and loyalty among readers who come back for quality, consistent content. This process also has a so-called snowball effect. With every new, well-crafted article a site's authority in the given subject naturally rises.

Google began devoting more intensive attention to topical authority above all in 2023, when it implemented it in rating news sites. In this context it takes into account, for instance, the history of covering a particular subject, local or professional expertise and citations from other trustworthy sources. Outside news, topical authority  is connected with the concept of E-E-A-T (experience, expertise, authoritativeness and trustworthiness).

It matters that you grasp the difference between topical authority and domain authority properly. While domain authority (DA) expresses a domain's overall authority, above all on the basis of the number and quality of backlinks, topical authority relates to a specific area or subject. 

How topical authority is built

Topic clusters and content depth

Topical authority is a key factor in SEO success and is built through a systematic, strategic approach to creating content. The foundation is organising content into so-called topic clusters, where you create an extensive "pillar" article covering the main subject. To it you attach "cluster" articles going into subtopics in depth. The aim is to answer all the relevant questions related to the given subject systematically and cover all the important search terms. For identifying these terms and questions, tools such as Ahrefs and SEMrush are invaluable, helping with detailed keyword research.

Internal linking and the site's structure

You also have to think about internal linking and the site's structure. Every article within a cluster should be connected with the main article and vice versa, thereby building a strong internal network of links. This logical navigation and meaningful hierarchy of the site not only improves the user experience but helps search engines grasp the relationships between the content and its importance. SEMrush is again a useful tool for analysing and optimising the internal structure.

E-E-A-T and authoritative content

An important part is also played by the E-E-A-T principle, which Google considers the basis of content's credibility. That means content should be created by authors with demonstrable experience and expert knowledge. Credibility is also built through demonstrable facts, sources and references. At the same time it matters to state the author's professional bio, citations and mentions in external media. When introducing E-E-A-T principles you can reach for external tools. SEMrush, for instance, offers practical guides and tips on its blog on how to go about it.

Entity-based SEO and credibility off the site

Another important factor is entity-based SEO and credibility off the site. This means gaining citations and mentions in other media, podcasts or expert articles. Google connects entities (for instance brands, people, subjects) and their links in its Knowledge Graph, which markedly contributes to overall credibility. To gain an overview you can use tools such as SEMrush (or alternatives such as Ahrefs or Brand24), which can clearly show you who links to you and where.

Consistently covering a subject over time

Watch out for consistency in covering subjects over time. Google favours sources that devote themselves to a given subject over the long term and regularly update and add new content. That signals that a site is alive, relevant and constantly developing in that area. Regularly updating content is essential.

How to measure topical authority

Measuring topical authority is a complex process covering qualitative and quantitative signals alike. It is not only about exact figures but about less measurable factors that contribute to overall credibility and expertise.

Qualitative signals of topical authority

Qualitative signals cannot be measured numerically. These signals are, however, immensely important for Google and users:

• The author's credibility: how do the author or authors come across to the audience? Do they have demonstrable experience and knowledge in the given area? Google places great emphasis on the E-E-A-T principle, which means content should be created by experts.
• Links and citations from other relevant sites: quality backlinks from authoritative sources are a strong indicator of topical authority.
• Users' reactions (comments, shares): the audience's engagement, such as comments, shares on social media and overall interaction with the content, indicates its relevance and value to users. These signals, albeit indirectly, tell Google about your content's quality. 

Quantitative metrics and tools

For measuring topical authority more accurately there are specific metrics and tools that will help you track progress and identify areas for improvement:

• The number of articles covering a subject: a simple but effective metric. The more quality articles you have in a given topic cluster, the more extensively you cover that subject. Watch out for covering subjects in duplicate. Instead of piling up content blindly, look for the right balance. Every new article should fill subjects not yet covered, which you should then naturally connect with articles already published.
• The percentage of cluster keywords covered: this is about how many important keywords within your topic cluster your site covers and how many of them it appears for in search results.
• The average position in the SERP (Search Engine Results Page): tracking the average position for keywords in a given cluster. An improving position indicates that Google sees your content as more relevant and more authoritative for that subject.

The number of clicks / impressions on a subject: a rising number of clicks and impressions for your topic clusters in Google Search Console indicates that users are ever more often looking for and finding your content.

A tool for tracking metrics	Description
Ahrefs	Outstanding for analysing the competition and identifying gaps in content. Its Content Gap report will show you which keywords your competition covers in the same topical cluster but you do not.
SEMrush	Helps with analysing competing domains and a site's structure. You can find out how systematically your competition covers a given subject and take inspiration from their approach.
Screaming Frog	This tool is ideal for technical analysis of a site's structure, internal linking and categorising content (for instance using tags or the URL structure). It helps ensure your site is technically optimised for topical authority.
Your own KPI tables	Creating a tracking template where you categorise keywords by topic cluster and record coverage, positions and changes over time will give you a complete overview of your progress. This know-how comes from practical SEO experience and complements data from other tools.

Comparing with the competition

Topical authority is relative and should always be judged in the context of your competition. Without comparison you have no clear idea of your position.

• Who covers more subjects? Analyse the competition in terms of the number of articles, the depth of coverage and the variety of content formats (articles, FAQs, categories).
• Who has a better position in individual clusters? Track competitors' positions using Ahrefs, Collabim or SEMrush and compare them with yours.
• Identifying gaps in content: look for terms or subtopics not covered, or covered more weakly by the competition. Those are your opportunities for building topical authority. It is recommended to create your own comparison table where you record the cluster's keywords, the competition and the differences in position. Ahrefs' Content Gap Report is invaluable for this purpose.

How to find out whether topical authority is improving

Evaluate progress regularly. It is essential that you know whether your strategies are set up properly and bringing results.

• Growth in organic traffic to articles within topic clusters: track this indicator in Google Search Console or Google Analytics. It is direct proof that people are looking for and finding your content.
• Improving positions in the SERP for topically related terms: tracking the average position within a cluster. Consistent improvement is a strong signal of growing authority.
• Extending a subject's coverage: notice how the number of keywords your site ranks for within the given cluster grows.
• Developing your own KPIs: besides the metrics mentioned above you can track other KPIs of your own, such as the percentage of keywords covered, the average position in a cluster, the number of interlinks between clusters or the rate of growth in new content on a given subject. The article "How to measure topical authority [in 2025]" by Kevin Indig offers a practical guide to a new way of grasping and measuring a site's topical authority.