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SEO Glossary

What is Domain Authority?

Domain Authority (DA) is a third-party search engine ranking score that predicts how likely a website is to rank in search engine result pages (SERPs). DA scores range from 1 to 100, with higher scores corresponding to a greater likelihood of ranking.

Understanding Domain Authority is essential for evaluating your website's competitive strength and planning an effective link-building strategy. Here's everything you need to know.

1

How is Domain Authority calculated?

Domain Authority is calculated by evaluating multiple factors, including the number of total backlinks, the number of linking root domains, the quality and authority of those linking domains, and link diversity. The score uses a machine learning model that best correlates with actual ranking positions across thousands of search results. DA is a comparative metric - it is most useful when comparing your domain against competitors rather than as an absolute measure of SEO health.
2

What is a good Domain Authority score?

There is no universal "good" DA score because it depends on your competitive landscape: • DA 1-20: New websites or sites with very few backlinks • DA 21-40: Small businesses and growing websites • DA 41-60: Established businesses with solid backlink profiles • DA 61-80: Authoritative sites with strong link profiles • DA 81-100: Major brands and highly authoritative domains (Google, Wikipedia, etc.) The goal is not to reach 100 - the goal is to have a higher DA than your direct competitors in search results.
3

How to improve Domain Authority

1. Build high-quality backlinks from authoritative, relevant websites 2. Remove or disavow toxic and spammy backlinks 3. Create linkable assets - research, tools, guides, and original data 4. Improve internal linking structure 5. Ensure your site is technically sound (fast, mobile-friendly, secure) 6. Publish fresh, high-quality content consistently 7. Earn brand mentions and unlinked citations DA improvements are gradual - expect months of consistent effort, not overnight jumps.
4

Domain Authority vs Page Authority

Domain Authority measures the ranking strength of an entire domain, while Page Authority (PA) measures the strength of a single page. A site can have a high DA but individual pages with low PA if those pages lack their own backlinks and internal link equity. Both metrics matter: DA provides a competitive benchmark, while PA helps prioritize which pages to strengthen through internal linking and backlink acquisition.
5

Limitations of Domain Authority

DA is not a Google ranking factor - Google does not use DA in its algorithm. It is a third-party predictive metric. Key limitations include: • DA can be manipulated through link schemes (though this often backfires) • New domains always start low regardless of content quality • DA does not account for on-page SEO, content relevance, or user experience • Scores fluctuate when the underlying index is updated Use DA as one signal among many, not as the sole measure of SEO success.

FAQ

Frequently asked questions

Is Domain Authority a Google ranking factor?
No. Domain Authority is a third-party industry metric, not an official Google score. Google has confirmed they do not use DA in their ranking algorithm. However, DA correlates with ranking performance because it measures many of the same signals Google values.
How often does Domain Authority update?
DA scores are updated periodically as the backlink index is refreshed. Scores can fluctuate with each update even if your link profile has not changed, because DA is a relative metric compared against all other sites.
Can Domain Authority go down?
Yes. DA can decrease if you lose backlinks, if competitors gain stronger links, or when the index is recalculated. A DA drop does not necessarily mean your actual rankings will change.

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