What Is Domain Authority? DA Explained
Domain Authority is Moz's proprietary 1-100 metric predicting a domain's ranking potential from its backlink profile. It is a tool metric, not a Google measure, and is best used for comparing competitor sets.
Explain It Like I'm 5
Domain Authority is a popularity score invented by Moz (not Google) to guess how strong a website is, from 1 to 100. Useful for comparing rivals, like comparing test scores - but Google never sees the number. It's a mirror, not the report card.
Understanding Domain Authority
Domain Authority (DA) is Moz's metric: a 1-100 scale predicting ranking potential, computed from backlink data (linking root domains, quantity, and quality metrics) via machine learning against actual SERP correlations. Moz updates it periodically, and scores shift when the index or model does.
The critical caveat: DA is not a Google metric. Google uses no equivalent single domain score publicly, and Googlers routinely remind that DA-like measures are third-party estimates. Other tools have siblings: Ahrefs' Domain Rating, Semrush's Authority Score, each with different math and scales. They correlate loosely and must never be compared across tools.
Correct uses: benchmarking competitor sets for relative difficulty, tracking your own trajectory over time within one tool, and sanity-checking link prospects within a consistent scale. Incorrect uses: absolute judgment, cross-tool comparison, promising ranking outcomes, or treating DA as an input Google reads.
DA rises the way the underlying reality rises: earning authoritative, relevant backlinks over time. There is no legitimate shortcut, and DA itself is never the goal; it is a lagging shadow of the link profile that is.
Types of Domain Authority
Comparative Use
Sizing up a SERP's authority range before entering.
Example: Target SERP showing DA 30-50 average, enterable with a focused link campaign.
Misuse
Chasing DA as a goal or cross-tool number.
Example: Buying links "to reach DA 50" or comparing Moz DA to Ahrefs DR directly.
Why Domain Authority Matters
As a comparative instrument within one tool, DA is genuinely useful for sizing up competition and prioritizing link effort. The discipline is remembering it measures your shadow, not your ranking.
Best Practices
Benchmark Competitor Sets
Use DA to size the competitive landscape for a niche: the typical DA of ranking pages tells you the authority bar.
Track Trajectory, Not Absolute Score
Movement within one tool over months reflects link-building reality. Absolute numbers invite vanity.
Sanity-Check Prospects
Within your chosen tool, DA helps filter link prospects quickly. Relevance checking follows, then manual review.
Report With the Caveat Attached
Stakeholders should know DA is third-party estimate. Pair it with actual rankings and traffic in every report.
Common Mistakes
Treating DA as a Google input
Fix: Google does not read or use it. Ranking changes follow real signals, not the Moz score.
Comparing DA across tools
Fix: Different math, different scales, loose correlation. A DR 40 is not a DA 40.
Buying links to raise DA
Fix: DA rises from earned profiles. Purchased inflation invites the exact penalties that destroy the underlying reality.
Where WPLink Fits
WPLink does not touch DA directly; it strengthens the internal distribution of whatever authority your domain actually has. Strong domains waste less of their earned equity when the inside matches the outside.
Frequently Asked Questions
Related Articles
Ready to optimize your internal links?
Get started with WPLink today and see the difference.
Download WPLink