What Is Domain Authority (DA)? The Complete 2026 Guide

If you've spent any time researching SEO, you've run into the term "Domain Authority" — usually shortened to DA, usually shown as a number between 1 and 100, and usually treated as a badge of honor. But what does it actually measure, where does the number come from, and how much should you actually care about it? This guide answers all three.

What Domain Authority actually measures

Domain Authority is a search engine ranking score developed to predict how likely a website is to rank in search engine results pages, on a logarithmic scale from 1 to 100. "Logarithmic" is the important word — moving from DA 20 to DA 30 is a meaningfully smaller jump than moving from DA 70 to DA 80. Higher-authority sites get progressively harder to improve further.

DA is built primarily from link data: how many unique domains link to a site, how authoritative those linking domains are themselves, and how the overall link profile compares to millions of other sites in an index. It is not a Google ranking factor — Google has stated plainly that it does not use any third-party's Domain Authority score in its own ranking systems. DA is a third-party estimate designed to correlate with ranking ability, not a signal Google itself consults.

Why DA is still useful, despite not being a Google metric

This is the part people get wrong in both directions. Some treat DA as gospel; others dismiss it entirely because "Google doesn't use it." Both miss the point. DA is useful as a comparative, directional signal:

• Benchmarking your site against 2-4 direct competitors in your niche.
• Tracking your own site's authority trend over months and years.
• Quickly triaging a long list of link prospects or acquisition targets.

What it's not useful for: predicting your exact ranking position for a specific keyword, or comparing across wildly different niches (a DA 40 in an obscure B2B niche is a very different achievement than a DA 40 personal blog).

What counts as a "good" Domain Authority score?

There's no universal good number — it depends entirely on your niche and site age:

• DA 1-15 — new sites, most sites less than a year or two old.
• DA 15-30 — established niche sites with a real, if modest, link profile.
• DA 30-50 — strong niche players, often multi-year sites with consistent link acquisition.
• DA 50-70 — well-known publishers, category leaders.
• DA 70+ — major platforms, top publishers, household-name brands.

The only benchmark that matters in practice is your direct competitors' scores, not this general table.

How to check your Domain Authority

Enter any domain into our free DA checker to see its score instantly, alongside Page Authority, Domain Rating and Spam Score — no signup required. For a full breakdown of how DA relates to those other metrics, read our DA vs PA vs DR guide, and if you're ready to start moving the number, see how to increase your Domain Authority.