If you’re trying to figure out how to increase domain authority, the first thing you need to understand is what DA actually is - and what it isn’t. Domain Authority is a metric created by Moz. Not Google. Not any search engine. It’s a third-party score from 1 to 100 that predicts how likely a domain is to rank in search results. Google does not use it, does not reference it, and has never confirmed it factors into rankings.

That matters because a lot of people treat DA like a direct ranking factor and make decisions based on that misunderstanding. DA is useful as a comparative benchmark - a rough sense of how your backlink profile stacks up against competitors. But chasing the number itself instead of the underlying signals is a mistake.

With that caveat out of the way, improving DA does correlate with improving the things that actually affect rankings. So let’s talk about what moves it.

How is domain authority calculated

Moz calculates DA using a machine learning model trained on actual Google search results. The model identifies which link-related features best predict whether a domain will rank, then assigns a score.

The biggest inputs are:

  • Number of linking root domains. How many unique websites link to you. This is the single most important factor. Ten links from ten different sites matter far more than a hundred links from one site.
  • Total number of backlinks. The raw count of inbound links across all your pages.
  • Quality of those links. Links from high-DA domains pass more weight. A single link from a DA 80 site can move your score more than fifty links from DA 10 sites.
  • Link profile diversity. A natural-looking distribution of link types, anchor text, and source diversity.

What’s notably absent: your content quality, your site speed, your on-page SEO, your social media following. DA is almost entirely a link-based metric. If your link profile doesn’t change, your DA won’t change - no matter how much you improve everything else on your site.

One more thing. DA is logarithmic. Going from 10 to 20 is relatively easy. Going from 50 to 60 is hard. Going from 70 to 80 is brutally difficult. This is by design - Moz uses the same 1-100 scale for every domain on the internet, and there’s a lot more competition at the top.

What actually moves DA

This is the only lever that matters significantly. Everything else is secondary.

You need links from real websites with real traffic, run by real people or organizations. These links should be editorial - meaning someone chose to link to you because your content deserved it, not because you paid them or traded favors.

Diversity of linking domains is critical. If your entire backlink profile comes from five sites, even if those five sites have high authority, your DA ceiling is low. Moz’s model weighs unique referring domains heavily because it signals broad trust across the web.

How to get these links: create content worth referencing. Original research, free tools, thorough guides with genuine depth, data that doesn’t exist elsewhere. I covered this in detail in the backlinks guide, but the short version is that the most effective link building strategy is making things people want to cite.

Digital PR works too. Getting quoted in publications, providing data for journalists, publishing studies that newsrooms pick up. This is harder than it sounds, but a single placement in a high-authority publication can be worth more than months of manual outreach.

Your DA can be dragged down by spammy links pointing to your site. Link farms, hacked sites, casino spam, automated directory submissions you never asked for - these accumulate over time, especially if your domain has any age.

Audit your backlink profile quarterly using Moz, Ahrefs, or Semrush. Look for:

  • Links from domains with no organic traffic
  • Links from sites in unrelated foreign languages with no connection to your content
  • Links from known link farms or PBN networks
  • Sudden spikes in backlinks you didn’t earn

For the worst offenders, use Google’s Disavow Tool. Be conservative with it - disavowing legitimate links hurts you. Only disavow links that are clearly spam or from manipulative sources. Moz factors in the quality of your link profile, not just the quantity, so cleaning up garbage can bump your score.

Earning links through content that fills gaps

Not all content attracts links equally. Blog posts that summarize what already exists online rarely earn backlinks because nobody needs to reference them - the original sources already exist.

Content that earns links tends to have one of these properties:

  • Contains original data or analysis. If you ran a survey, analyzed your own user data, or compiled statistics that didn’t previously exist in one place, writers in your space will cite you.
  • Is the definitive resource on a specific topic. Not a generic overview - a thorough breakdown that goes deeper than anything else available. Think of it as the page that other pages link to as “further reading.”
  • Provides a free tool or interactive resource. Calculators, generators, templates, and tools earn links because they can’t be replicated in a blog post. Someone writing about keyword clustering can explain the concept, but they’ll link to a tool that actually does it.
  • Simplifies something complex with original visuals. Diagrams, flowcharts, and data visualizations that explain a process better than text alone get embedded and linked across the web.

The key is identifying what your space is missing and filling that gap. Run a content gap analysis on sites that rank for your target topics. Find questions with no great answer. Build the great answer.

I need to be precise here: internal links do not directly affect your Domain Authority. DA is calculated from your external backlink profile. Full stop.

But internal links matter indirectly. Strong internal linking ensures that when a page earns backlinks, the link equity flows through your site to other important pages. A page with ten great backlinks but no internal links to the rest of your site is an island - the authority it earned doesn’t help your other pages rank, and those other pages don’t earn their own backlinks because they’re not ranking.

Good internal linking also improves crawlability. If Google can discover and index more of your pages, those pages can rank, attract backlinks, and feed your domain’s overall authority. It’s indirect but it compounds over time.

Building page authority across many pages

Your Domain Authority is a domain-level prediction, but it’s influenced by the collective strength of your pages. A site with one page that has a strong page authority score won’t have a high DA. A site with dozens of pages that each have moderate page authority will.

This means publishing consistently on topics you can realistically rank for and building individual page authority through targeted link earning. Instead of trying to get all your backlinks pointed at your homepage, spread them across your best content.

Common myths that waste your time

“Social signals boost DA.” No. Social shares, likes, and followers have no direct effect on Domain Authority. Moz doesn’t factor them in. Social activity might indirectly lead to backlinks if the right person sees your content, but the social signal itself does nothing.

“Publishing more content increases DA.” Only if that content earns backlinks. Publishing a hundred articles that nobody links to won’t move your DA a single point. Volume without quality is noise.

“Buying links is the fastest way.” Buying links is the fastest way to get links that Google ignores or penalizes you for. Even if Moz counts them temporarily, when those link farms get deindexed - and they always do - your DA drops right back down. And your Google rankings might drop further.

“Internal linking directly improves DA.” As covered above, internal links do not factor into Moz’s DA calculation. They help with ranking and equity flow, but they won’t change your DA score.

“DA updates immediately when you get links.” Moz updates DA periodically, not in real-time. You might earn a great backlink today and not see it reflected in your DA for weeks. Don’t obsess over daily checks.

“A high DA guarantees rankings.” DA predicts ranking likelihood. It doesn’t guarantee anything. I’ve seen DA 30 sites outrank DA 70 sites for specific queries because of superior on-page optimization, content depth, and search intent matching. DA is one signal among hundreds.

Realistic timeline for DA improvement

If anyone tells you they can increase your DA by 20 points in a month, they’re either lying or building links that won’t last.

Here’s what to realistically expect for a site starting around DA 15-20 with consistent effort:

  • Months 1-3: Build foundational content and start digital PR. DA might not move at all. You’re planting seeds.
  • Months 3-6: First backlinks start appearing and getting indexed. DA might increase by 3-5 points. The early gains come fastest because the logarithmic scale makes low DA easier to improve.
  • Months 6-12: Compounding begins. Older content starts ranking and attracting organic backlinks without outreach. DA might climb another 5-10 points if your content strategy is solid.
  • Year 2 and beyond: Slower, steadier growth. Each point gets harder to earn. Sites that maintain consistent quality content production and earn backlinks naturally tend to plateau in the 40-60 range unless they have significant brand recognition or media coverage.

The biggest predictor of DA growth rate is the quality of your content and whether it gives people a genuine reason to link. No shortcut replaces that.

Where DA fits in your SEO strategy

DA should be a benchmark you monitor, not a KPI you optimize for directly. The actions that improve DA - earning quality backlinks, building link-worthy content, cleaning up spam - are the same actions that improve rankings. So focus on rankings, traffic, and conversions. Let DA be the trailing indicator that confirms you’re heading in the right direction.

Check it monthly. Compare it against your direct competitors. If the gap is narrowing, your strategy is working. If it’s widening, something in your link acquisition approach needs to change.

And remember: DA is Moz’s prediction about your site, not Google’s assessment of it. The score is useful. It’s not gospel.