Domain authority guides
Short, sourced answers to the questions people ask most about site authority.
What is domain authority? Meaning, scale and how Moz calculates it
Domain authority is Moz's 1 to 100 score for how likely a website is to rank. Learn what DA means in SEO, how Moz calculates it, why it moves and how to use it.
Read guideHow to check domain authority of any website (free, in 3 ways)
Check the domain authority of any website in seconds: one domain, a whole list in bulk, or several sites side by side. Plus how to read the result correctly.
Read guideWhat is a good domain authority score?
There's no single good domain authority. See realistic Moz DA ranges for new sites, local businesses, blogs and brands, and how to set a target that matters.
Read guideHow to increase domain authority: 8 steps that actually work
A practical plan to increase your Moz domain authority: earn links from more unique sites, publish linkable assets, reclaim lost links and avoid tactics that backfire.
Read guideDomain Authority vs Domain Rating vs Trust Flow: Moz, Ahrefs and Majestic compared
Moz DA, Ahrefs DR, Majestic Trust Flow and Semrush Authority Score all run 0 to 100. See what each one measures, why they disagree and which to use for what.
Read guidePage Authority explained: what PA means and how it differs from DA
Page Authority is Moz's 1 to 100 score for how well a single page can rank. Learn how PA is calculated, what a good PA is and when to use it instead of DA.
Read guideMoz Spam Score explained: what it means and how to check it
Moz Spam Score shows the share of sites with similar features that Google penalized or banned. Learn the low, medium and high ranges and how to read it with DA.
Read guideWhy did my domain authority drop? 7 causes and what to do
Your Moz domain authority went down? Here are the 7 real reasons DA drops, how to tell which one hit you, and when a drop is worth worrying about.
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