TECHNICAL · SEO GLOSSARY
Domain Authority (DA/DR) in SEO
Third-party metrics (Moz Domain Authority, Ahrefs Domain Rating, Semrush Authority Score) that estimate a website\'s overall backlink profile strength as a proxy for organic ranking potential — commonly used to prioritise link building targets and evaluate the relative value of earning a backlink from a given domain.
Definition
Domain authority metrics are proprietary scores developed by SEO tool vendors to estimate a domain\'s overall link profile strength — predicting organic ranking potential as a proxy for Google\'s own internal domain signals. Primary metrics: (1) **Moz Domain Authority (DA)**: 0-100 scale, logarithmic, representing the overall quality and quantity of inbound links. Developed by Moz; widely used for link prospect qualification. (2) **Ahrefs Domain Rating (DR)**: 0-100 scale, based on the number and quality of referring domains weighted by their own DR — measures the strength of the linking domain\'s backlink profile. (3) **Semrush Authority Score**: 0-100 composite of backlink data, organic traffic, and spam signals. (4) **Majestic Trust Flow / Citation Flow**: two-dimensional metrics measuring link quality (Trust Flow) and quantity (Citation Flow). Important caveats: (a) These are third-party approximations, not Google signals — Google has no "domain authority" score in its ranking systems. (b) They are lagging indicators — they change slowly and don\'t reflect very recent link acquisition. (c) They can be gamed (DA/DR of newly purchased domains or those with many low-quality links may be inflated). For link building prospect qualification, DA/DR is used as a minimum threshold filter (e.g., only outreach to domains with DR ≥ 40) — but topical relevance, organic traffic, and audience alignment are often more predictive of link value than the authority score alone.
Why it matters for SEO
Domain authority metrics provide a fast, scalable proxy for evaluating potential link targets during prospect research — sorting hundreds of prospects by estimated link value without manually reviewing each site\'s link profile. Higher DA/DR sites generally pass more PageRank-equivalent value to the linked page, making links from high-authority domains more ranking-valuable than links from low-authority domains.
How DeepSEOAnalysis checks this
DeepSEOAnalysis does not compute or display domain authority metrics — these are third-party measures of inbound link profiles, not on-page technical quality signals. For domain authority data, use Moz, Ahrefs, Semrush, or Majestic.
Useful tools and resources
GLOSSARY
Related terms
technical
Backlink Prospecting
The research phase of link building that identifies external websites with existing backlink patterns indicating propensity to link to new content — specifically using competitor backlink data, resource page identification, and broken link detection to build targeted outreach prospect lists.
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Toxic Link
A backlink from a low-quality, spammy, or manipulative source that risks triggering a Google manual action or algorithmic penalty — including links from link farms, paid link networks, comment spam, low-quality directories, and sites with thin or scraped content. Toxic links are candidates for Google\'s disavow tool.
Read definition →technical
Competitor Backlink Analysis
The process of examining a competitor website\'s backlink profile to identify which external sites link to them, understand the types of content that attract links in the target niche, and discover outreach targets likely to link to similar content — a core input for link building prospect research.
Read definition →technical
Link Outreach
The process of contacting external website owners, editors, and content managers with personalised emails requesting that they link to specific content — the primary mechanism for systematic link building campaigns. Link outreach combines prospect research, contact finding, personalised email sequences, and follow-up management to earn editorial backlinks.
Read definition →technical
Link Prospect Research
The process of identifying and qualifying external websites as potential link building targets — evaluating domain authority, topical relevance, audience alignment, and linking history to build prioritised prospect lists for outreach campaigns.
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