Glossary
What is domain authority? SEO definition
June 4, 2026
Domain authority (often abbreviated as DA) is a third-party SEO metric that estimates the strength or credibility of a domain name in the eyes of search engines, primarily based on its profile of backlinks. It is calculated by tools like Moz, Ahrefs, or Semrush. It is not an official Google score, but a useful indicator for comparing sites and guiding a netlinking strategy in e-commerce SEO.
Domain authority is useful for putting a site's SEO strength into perspective, but it should remain a steering indicator. An online store does not grow by chasing a score: it progresses thanks to useful content, quality links, and a coherent structure.
Summary
Definition of domain authority in SEO
Domain authority summarizes in a single figure (often out of 100) the theoretical capacity of a domain to rank in search results. It is based on statistical models correlated with observed ranking, not on internal Google data.
Similar metrics depending on the tools:
To fully understand this concept, we notably find Domain Authority (DA): Moz ( moz.com/domain-analysis ), Domain Rating (DR): Ahrefs, Authority Score: Semrush and Page Authority (PA): Moz, at the level of a specific URL (product sheet, article).
Useful distinctions:
To fully understand this concept, we notably find Domain authority vs PageRank: PageRank was the historical Google algorithm; it is no longer publicly displayed. DA is a private metric of SEO publishers, Domain authority vs page authority: the domain covers the entire site; the page targets a URL (blog guide, collection), Domain authority vs backlink: backlinks are the links received; DA is an estimated synthesis of them, Domain authority vs domain name: the domain name is the web address; DA measures its perceived SEO reputation, Authority vs organic traffic: a site can have a moderate DA but high traffic in well-targeted long-tail niches and Authority vs on-site content: quality of sheets, speed, UX matter as much as external links.
Why Domain Authority matters for e-commerce sites
Merchants often compare their DA to that of competitors or marketplaces. Useful for steering, to be interpreted with caution.
For an online store, this notably includes Competitive Benchmark: positioning your store against industry leaders, Netlinking Prioritization: measuring the impact of a PR campaign or partnerships, Due diligence: evaluating a domain before acquisition or redesign, Outreach: some partners filter sites based on a PDF/DA minimum, and Long term: authority is built over months, not a few days.
A young Shopify store usually displays a low DA: this is normal. Google does not penalize youth if the content meets the search intent. DA primarily helps to guide efforts (linkable content, editorial backlinks) rather than predict an exact position on a query.
Google regularly points out that there is no official authority score communicated to webmasters (Google Search Central). Treat DA/DR as clues, not ranking guarantees.
How to interpret the evolution of a domain's authority
SEO tools estimate domain authority based on proxy signals, including:
Concretely, we notably find the Number and quality of backlinks: links from recognized sites vs. spam, Diversity of referring domains: several unique sources rather than a single massive site, Natural link profile: varied anchors, no artificial patterns, Domain history: age, thematic continuity, and Internal links: solid linking redistributes value among pages.
Typical evolution of a DTC brand:
Concretely, we notably find Shopify Launch: low DA, few referring domains, Blog publishing, guides, PR: first niche media backlinks, Partnerships, editorial affiliation: DR progresses gradually, and Deep pages (collections, product sheets) rank thanks to internal linking + global authority.
Use case: indie cosmetics brand vs. major beauty marketplace. The marketplace shows a high DR (thousands of backlinks, press, comparison sites). The indie brand has a modest DR but ranks for "sensitive skin vitamin C serum" thanks to a comprehensive product sheet, reviews, expert blog, and a few beauty blog links. Moral of the story: global DA guides the strategy, but a niche query is also won through page-by-page relevance.
Domain authority for a Shopify store
Shopify does not assign domain authority: it is your custom domain and your editorial strategy that build authority.
In Shopify, you will notably find Custom domain: focus backlinks and history on brand.com, not myshopify.com, Shopify Blog: host linkable content (guides, studies) on your domain, Internal linking: link blog, collections, product pages, glossary (Shopify blog), Google Search Console: Links report (real referring domains indexed by Google), Ahrefs / Moz / Semrush: DA, DR tracking, monthly progress and Avoid: buying links, spam directories (Google manual action risk).
E-merchant Checklist:
In Shopify, we notably find Baseline DA/DR at launch or redesign, Content goal: 2 to 4 linkable assets per quarter, Measure new referring domains in GSC, Compare progress to 2 or 3 direct competitors, not to Amazon, and Prioritize organic traffic and conversions, not the score alone.
Shopify provides a decent technical SEO foundation (HTTPS, URLs, sitemap). Domain authority is mostly earned off-platform: PR, partnerships, cited content.
The essentials to remember about domain authority
Key takeaways include: Domain authority = a third-party metric estimating the SEO strength of a domain, DA (Moz), DR (Ahrefs), Authority Score (Semrush): not an official Google score, primarily linked to the backlink profile and domain history, useful for benchmarking and link building; does not replace content and UX, and Shopify: custom domain, blog, editorial links, GSC + SEO tools.
Associated terms, FAQ, and going further
Associated Terms
Notions related to this topic notably include Backlink: inbound links that feed authority, E-commerce SEO: global strategy including authority, Domain name: measured web address, Canonical link: consolidation of on-site signals, and Customer acquisition: organic traffic linked to SEO.
FAQ
Are Domain Authority and Autorité de Domaine the same thing?
Yes. Domain authority is the English term; autorité de domaine is the common French translation in SEO. It is often abbreviated as DA.
Does Google use DA to rank sites?
Google does not publish a DA score. It uses hundreds of proprietary signals (content, links, page experience). The DA from third-party tools sometimes correlates with ranking but is not directly read by Google.
What DA should a Shopify store aim for?
There is no universal threshold. Compare yourself to direct competitors in your niche. A small or medium-sized business can thrive with a modest DA on targeted queries if the content and intent are well-served.
DA or DR: which one to track?
Choose one tool and remain consistent over time. Moz (DA), Ahrefs (DR), and Semrush (Authority Score) use different models; do not mix scales in the same table.
Going Further
Notions related to this topic notably include Complete E-commerce SEO Guide, Content marketing and SEO traffic, Increase organic traffic, Is Shopify good for SEO?, Internal linking strategy, and Return to the Qstomy e-commerce glossary.
Sources: Moz (Domain Authority), Google Search Central (SEO Starter Guide).
Enzo
13 May 2026
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