What Domain Authority Is and How Google Evaluates It: A Complete Guide to Understanding Website Credibility

Domain Authority (DA) is a metric developed by Moz that predicts how well a website will rank in search results, scored from 1-100. It’s calculated using over 40 factors, primarily focusing on linking root domains, total links, MozRank, and MozTrust scores. However, DA is not a Google metric—it’s a third-party tool that uses machine learning to predict ranking potential based on link data.

Google doesn’t use “domain authority” as a specific metric. Instead, Google evaluates domain credibility through E-A-T (Expertise, Authoritativeness, Trustworthiness), content quality, user experience signals, backlink profile quality, technical performance, and brand strength. Google’s evaluation is more holistic and considers hundreds of ranking factors beyond just link metrics.

Domain Authority scores range from 1-100 on a logarithmic scale, meaning it’s exponentially harder to improve as scores increase. While useful for competitive analysis, DA should not be the primary SEO focus. Instead, concentrate on factors that actually influence Google rankings: quality content, technical SEO, user experience, and natural link earning.

Google ranks websites using over 200 ranking factors including content relevance and quality, user experience signals (Core Web Vitals), mobile-friendliness, page loading speed, backlink quality and relevance, E-A-T signals, technical SEO health, and user engagement metrics. The algorithm prioritizes content that best satisfies user search intent while providing excellent user experience.

DA (Domain Authority) measures the overall ranking potential of an entire domain, while PA (Page Authority) measures the ranking potential of individual pages. Both are Moz metrics scored 1-100. DA considers domain-wide factors like total backlinks and root domains, while PA focuses on page-specific metrics like individual page links and content quality.

New domains typically start with very low DA scores (0-10) because DA heavily weighs historical link data and domain age. Building meaningful DA takes 6-18 months of consistent effort. However, new domains can still rank well in Google if they provide excellent content, user experience, and earn quality backlinks naturally.

There’s no legitimate way to quickly increase DA. Sustainable DA growth requires: creating high-quality, comprehensive content, earning natural backlinks from relevant authoritative sites, improving technical SEO and site performance, building brand recognition and trust signals, and maintaining consistent content publishing. Expect 6-12 months for noticeable improvements.

You can check DA and PA using Moz’s Link Explorer tool (free version allows limited queries), MozBar browser extension, or third-party tools like Ahrefs’ Domain Rating, SEMrush’s Authority Score, or free tools like SmallSEOTools. For comprehensive analysis, use Google Search Console for actual Google performance data.

DA is relative and industry-dependent. Generally: 0-20 is very low, 20-40 is below average, 40-60 is average to good, 60-80 is very good, and 80+ is excellent. However, focus more on beating direct competitors’ DA rather than achieving arbitrary numbers. A DA of 35 might be excellent in some niches but poor in others.

Major websites like Google, Facebook, Wikipedia, YouTube, and Apple typically have DA scores of 90-100. News sites like CNN, BBC, and major universities also score very high. However, these scores are less relevant for most businesses—focus on competing within your industry and geographic market rather than against global giants.

Backlinks are the primary factor in DA calculation. Quality backlinks from authoritative, relevant domains significantly boost DA, while links from low-quality or spammy sites can hurt it. Factors include: linking domain authority, topical relevance, link placement and context, anchor text diversity, and natural link acquisition patterns. Focus on earning rather than buying links.

Google verifies domain ownership through Google Search Console using several methods: HTML file upload to your website’s root directory, HTML meta tag addition to your homepage, Google Analytics or Google Tag Manager verification, domain name provider verification, or DNS TXT record addition. This verification allows access to search performance data and Google tools.