Semrush Site Audit: How to Prioritize Fixes and Improve SEO

A Semrush site audit can surface hundreds of issues in minutes, but fixing all of them in the wrong order is how most teams burn a full sprint and move zero revenue needles. Running the crawl is the easy part. The real skill is knowing which findings actually threaten your rankings and which ones you can safely ignore for now.

Most guides walk you through button clicks and stop there. They rarely address the moment you stare at 47 warnings and wonder whether to start with the broken canonical tags or the missing alt text. Understanding how to use site audit in Semrush goes far beyond launching a crawl. It means bridging the gap between “crawl complete” and “business impact,” which is exactly where you get stuck.

Below you’ll find a framework for configuring, interpreting, and prioritizing your Semrush website audit findings, plus how to reconcile conflicting results from other tools. By the end, you’ll know how to turn a noisy audit report into a focused fix list that protects the pages driving your revenue.

What Is Semrush Site Audit and What Does It Actually Measure?

Semrush Site Audit is the technical health module inside the Semrush platform. It scans any website for over 140 technical SEO and site health issues, then groups them by severity so you can see what needs attention first.

Think of it like a building inspector who checks every room in your house but hands you a report sorted by “fire hazard,” “code violation,” and “cosmetic scratch.” The tool goes beyond listing problems. It categorizes them so you’re not patching drywall while the wiring sparks.

What the Crawl Actually Checks

According to the Semrush Knowledge Base, the tool performs over 140 distinct on-page and technical SEO checks. These span several core areas.

• Crawlability and indexation: Whether search engines can discover and index your pages without hitting dead ends or redirect loops
• On-page SEO: Meta tags, heading hierarchy, and duplicate content signals
• Site performance: Page speed indicators, Core Web Vitals markers, and HTTPS implementation
• Internal linking: Orphan pages, broken links, and anchor text distribution across your site structure

If you’re evaluating whether Semrush is the right investment for your stack, our Semrush review covers pricing tiers and feature depth in more detail.

What It Does Not Measure

No crawl-based audit replaces manual content quality review. The tool won’t tell you if your product page copy is unconvincing or if your value proposition is buried below the fold.

It also doesn’t evaluate off-page authority in the same pass. Backlink analysis lives in a separate Semrush module (more on the semrush backlink audit tool later). Keep that distinction clear so you don’t treat the site health score as an all-in-one SEO grade.

How to Use Site Audit in Semrush Without Flooding Your Report With Noise

Learning how to use site audit in Semrush is straightforward on the surface. You click a button and wait for the crawl. The part most guides skip is configuration, which is where you either get a focused report or a 2,000-line spreadsheet of noise.

With its high-speed crawlers, you can get on-demand crawling daily or weekly as per your preference, but that flexibility means you need to be intentional about what you include.

Step 1: Create a Project

Log in to your Semrush dashboard and click “Create Project.” Enter the domain you want to audit without the “www” prefix. You can let Semrush auto-generate the project name or set one manually.

Step 2: Configure Your Site Audit

This is the step most people rush through, and the reason their reports are noisy.

Navigate to “Site Audit” under “On Page & Tech SEO” in your dashboard. Before you hit start, specify which subdomains to include and set a page limit.

If you have a 50,000-page e-commerce catalog but only care about your core product pages and blog, crawl those subdirectories instead of everything. Exclude staging environments and parameter-heavy URLs that bloat your results.

Are you auditing a subdomain like blog.yoursite.com separately from the root domain? Decide that now. Mixing them creates duplicated findings that make prioritization harder.

Step 3: Start Your Crawl-Based Audit

Click “Start Site Audit.” Depending on your page count, the crawl takes anywhere from a few minutes to several hours. Once it finishes, the dashboard surfaces your site health score alongside a breakdown of every finding.

Step 4: Analyze Errors, Warnings, and Notices

This is where most teams make their first prioritization mistake. They see 12 errors and 87 warnings and treat them all with equal urgency. Don’t. Start with errors only. Work through warnings next. Notices can usually wait until your next monthly cycle.

For each error, click “Why and how to fix it” to see Semrush’s remediation guidance. Some fixes are one-line changes. Others require developer time, so flag those immediately so they don’t sit in limbo.

Step 5: Review the Thematic Reports

Semrush groups audit findings into seven thematic reports: crawlability, HTTPS, international SEO, performance, internal linking, markup, and Core Web Vitals. Review each report individually rather than relying solely on the overview tab.

The crawlability section deserves your special attention. It shows your indexable vs. non-indexable page ratio. A low crawlability score means search engines can’t reach your content, which makes every other optimization irrelevant.

Step 6: Run Campaign Re-Audits Every Month

A single audit is a snapshot. Schedule monthly re-audits to track whether your fixes actually moved the needle and to catch new issues introduced by site updates or CMS changes. The trend line matters more than any individual score.

If you need a broader methodology beyond Semrush’s toolset, our guide on how to perform an SEO audit for your website covers the full strategic framework.

Which Site Audit Issues Should You Fix First?

You’ve run the crawl. Now you’re looking at a wall of colored badges and wondering where to start. The issues are divided into three groups (errors, warnings, and notices) depending on their severity. But even within the “errors” category, not all problems carry equal weight.

The Revenue-First Triage Framework

Here’s the question most audit guides never ask: which pages actually generate revenue?

Sort your errors by the URLs they affect. If a broken canonical tag sits on a blog post that gets 12 visits a month, it can wait. If it sits on your highest-converting product page, fix it today.

We use a simple two-axis filter when triaging Semrush website audit findings for clients:

Priority	Criteria	Action
Critical	Error on a page generating revenue or ranking in top 20	Fix this week
High	Error on an indexable page with steady traffic	Fix this sprint
Medium	Warning on any indexed page	Schedule in next cycle
Low	Notice, or warning on a low-traffic page	Batch quarterly

Common Errors That Deserve Immediate Attention

Broken internal links on money pages erode both crawl equity and user trust. Redirect chains longer than two hops waste crawl budget. Missing or duplicate title tags on category pages cause cannibalization headaches that compound over time.

Orphan pages (pages with zero internal links pointing to them) are another silent killer. If Semrush flags orphaned pages that contain valuable content, adding internal links is one of the highest-ROI fixes you can make.

For enterprise-scale sites where triage gets exponentially harder, our enterprise SEO audit guide details how to handle audits across hundreds of thousands of URLs.

How Much Should You Trust the Site Health Score?

Semrush’s site health score is the first number everyone sees after a crawl. It’s a composite metric that rolls all errors, warnings, and notices into a single percentage. A higher score means fewer issues relative to the number of pages crawled.

But should you optimize for the score itself?

When the Score Helps and When It Misleads

The score is useful for tracking progress over time. If you fixed 30 errors last month and the score jumped from 72% to 89%, that trend confirms your fixes took effect.

Where it misleads: two sites can share identical health scores while facing very different risk profiles. A site with 5 critical indexation errors and 95 clean pages scores the same as a site with 100 cosmetic warnings and zero blocking issues. The number hides the severity distribution.

Never chase a perfect 100% score. Some “issues” are intentional design choices, like noindexing a staging page or using a 302 redirect temporarily during a migration. Fixing those to appease the dashboard actually creates new problems.

Use the Score as a Compass

Compare your health score against the industry benchmark Semrush provides. That context tells you whether your site is broadly competitive or falling behind. Then go deeper into the thematic reports to find what actually matters for your business.

A site scoring 78% with all money pages clean is in better shape than a site scoring 94% with broken checkout flows.

Why Do Semrush and Ahrefs Audit Results Disagree?

If you’ve ever run the same domain through Semrush and Ahrefs, you’ve probably noticed the results don’t match. Different crawl depths, different rule sets, and different severity classifications produce different outputs.

3 Reasons the Numbers Diverge

First, crawl scope. Semrush and Ahrefs don’t always crawl the same pages by default. Subdomain inclusion, JavaScript rendering capabilities, and page limits vary between platforms.

Second, rule definitions. What Semrush classifies as an “error” might appear as a “warning” in Ahrefs, or not surface at all. The semrush backlink audit tool flags link-related issues differently than Ahrefs’ backlink audit because their underlying toxicity models use different signals.

Third, crawl timing. If your site had a temporary server hiccup during one crawl but not the other, that single event skews results. A 403 error that lasted two minutes can show up in one tool’s report and be invisible in the other’s.

How to Reconcile Conflicting Findings

Cross-reference the critical issues only. If both tools flag the same URL with an indexation problem, that’s a confirmed issue worth fixing immediately. If only one tool flags it, investigate manually before spending engineering time.

We keep a comparison spreadsheet with three columns: “flagged by both,” “Semrush only,” and “Ahrefs only.” The first column gets priority. The other two get investigated but not automatically actioned.

For a broader look at how different platforms compare, our SEO audit tools roundup breaks down feature differences across the market.

What Causes 403 Errors or Missing Pages in a Semrush Website Audit?

You launch your Semrush site audit and the report comes back showing pages you know exist as “not found” or blocked by 403 status codes. Before you panic about missing content, check whether the problem is actually on your server or in your crawl configuration.

Server-Side Causes

Aggressive rate limiting is the most common culprit. If your server firewall or CDN treats Semrush’s crawler as a bot attack, it returns 403 responses before the crawler can fetch the page. Whitelist Semrush’s crawler user agent in your server configuration to solve this.

Robots.txt rules can also block the crawl silently. If you’ve disallowed entire subdirectories, Semrush respects those directives and reports those pages as inaccessible.

Configuration-Side Causes

If you set the crawl scope too narrowly (say, limiting to 500 pages on a 5,000-page site) Semrush simply stops before reaching deeper URLs. Those pages were never requested in the first place.

JavaScript-rendered content can also create phantom issues. If critical content loads only after client-side execution and the crawler doesn’t fully render JavaScript, it reports the page as thin or partially empty. Check whether your affected pages rely on client-side rendering for primary content.

Here’s a quick scenario we see regularly: a marketing team migrates their blog to a new CMS, forgets to update robots.txt, and the next Semrush crawl flags 200 pages as blocked. Two hours of investigation later, the fix is a single line in a text file.

The audit did its job; it surfaced the problem. You just need to distinguish between “broken page” and “blocked crawler.”

Semrush Site Audit vs Other Audit Tools: Which One Fits Your Workflow

Choosing between Semrush and standalone crawlers like Screaming Frog, Sitebulb, or Ahrefs’ audit module depends less on feature checklists and more on how your team actually works.

Integrated Suite vs. Dedicated Crawler

Semrush’s strength is integration. Your audit findings live alongside keyword data and position tracking in the same dashboard. If you’re already using Semrush for research and monitoring, running audits inside the same ecosystem saves you time and reduces context-switching.

Standalone crawlers like Screaming Frog offer deeper configuration: custom extraction rules, regex filters, and unlimited crawl depth on the desktop version. If your technical SEO team needs granular control, a dedicated crawler paired with Semrush for broader insights often works better than either tool alone.

What About Semrush Free Site Audit Options?

The semrush free site audit tier lets you crawl up to 100 pages per project. That’s enough for a small business site or a quick sanity check on a subdomain. For anything larger, the page limit makes it impractical for ongoing use.

If you’re evaluating whether to invest in the paid tier, run the free crawl first and assess how many of the flagged issues you can actually action. If the free report surfaces problems you didn’t know existed, upgrading pays for itself quickly.

If you want to explore alternatives before committing, our list of Semrush alternatives covers comparable platforms.

Factor	Semrush Site Audit	Screaming Frog	Ahrefs Site Audit
Best for	Teams already in the Semrush ecosystem	Technical SEOs needing deep custom crawls	Teams using Ahrefs for backlink analysis
Free tier	100 pages per project	500 URLs (desktop)	No free audit tier
Backlink audit	Separate module with toxicity scoring	Requires integration with third-party API	Built into the same dashboard
Recurring crawls	Scheduled daily or weekly	Manual or via automation scripts	Scheduled weekly
JavaScript rendering	Supported	Supported (resource-intensive)	Supported

The semrush backlink audit tool specifically deserves a mention here. It runs a separate analysis focused on toxic backlinks and disavow file management. If link quality is a concern for your domain, that module complements the site audit rather than replacing it.

For teams exploring AI-driven alternatives that automate detection and remediation, our overview of AI technical SEO audit tools covers what’s available now.

Why Your Audit Process Should Prioritize Revenue Risk

Here’s the uncomfortable truth about site audits: a clean report doesn’t guarantee rankings, and a messy report doesn’t necessarily mean you’re in trouble. Search Engine Land has argued that many SEO audits become time-wasting exercises precisely because teams treat them as checklists rather than strategic instruments.

What separates a productive audit from busywork is the lens you apply to the findings.

Connect Every Fix to a Business Outcome

Before you assign a single task from your Semrush site audit, ask: “If this issue stays unfixed for 90 days, what happens to revenue?”

Some answers are obvious. A broken checkout page on an e-commerce site hemorrhages money every hour.

Other answers require more investigation, like whether a canonicalization error on a category page is suppressing a URL that ranks for a high-intent keyword.

The issues that don’t have a clear revenue connection? Those go to the bottom of your backlog. They stay on the list until you’ve shipped the high-impact fixes.

The Monthly Audit Cadence That Actually Works

We recommend a three-tier rhythm for how to use site audit in Semrush over time:

• Weekly: Automated crawl running in the background to catch regressions (broken links from new deployments, accidental noindex tags)
• Monthly: Manual review of the thematic reports, focusing on crawlability and Core Web Vitals trends
• Quarterly: Full strategic audit that cross-references Semrush findings with Google Search Console data and revenue analytics

This cadence prevents both extremes: ignoring technical debt for months and over-auditing to the point where you spend more time in dashboards than shipping fixes.

When to Bring in a Specialist

Some Semrush audit findings have straightforward fixes, like adding missing alt attributes or updating stale redirects. Others involve architectural decisions that ripple across your entire site: migration-induced canonicalization issues, hreflang conflicts on international domains, or JavaScript rendering problems that require infrastructure changes.

If your semrush free site audit or paid crawl surfaces issues beyond your team’s technical bandwidth, that’s the signal to bring in specialists rather than letting the findings age in a spreadsheet.

For e-commerce teams specifically, technical audit challenges multiply with product catalog size. Our e-commerce SEO audit guide addresses the unique issues that large catalogs introduce.

Frequently Asked Questions

How do I turn Semrush Site Audit findings into a developer-friendly ticket list?

Group issues by template or component (for example, product pages, blog posts, category pages) and write tickets that specify impacted URL patterns, expected behavior, and acceptance criteria. Include one or two example URLs, the suspected root cause, and the exact place to validate the fix (browser, source HTML, server header, or CMS setting).

What is a practical way to estimate SEO impact before fixing an issue?

Prioritize fixes on pages that already have proven demand, then estimate upside by combining current impressions, average position, and conversion value per session from your analytics stack. If you cannot quantify upside, classify the task as risk reduction (prevents loss) versus growth (creates gain) to decide how aggressively to schedule it.

How can I validate that an audit issue is truly resolved after a release?

Do a quick spot check on a small set of affected URLs first, then rerun the crawl and confirm the issue count drops for that specific rule. For critical changes, also verify in Google Search Console over the next few days to ensure indexing and coverage signals move in the expected direction.

How should teams handle audit items that require cross-functional input (SEO, engineering, design, and content)?

Assign a single owner per issue category and define a RACI (who is Responsible, Accountable, Consulted, and Informed) before implementation begins. A short pre-sprint review that aligns on tradeoffs, like UX impact versus crawl efficiency, prevents rework and stalled tickets.

How do I avoid wasting time on issues that are correct but intentionally configured?

Maintain a documented list of known intentional states (such as specific noindex rules, temporary redirects, or blocked environments) and map them to URL patterns. When your audits flag these items, you can label them as approved exceptions and focus on unexpected deviations instead.

What is the best way to set KPIs for technical SEO work so stakeholders understand progress?

Track leading indicators (number of critical issues affecting key templates, crawlability metrics, and performance trends) and pair them with business metrics (organic sessions, conversions, and revenue on the same page groups). Reporting both reduces pressure to chase cosmetic improvements and keeps your program tied to outcomes.

How can I use Semrush Site Audit to support SEO during a redesign or migration?

Run a baseline crawl before changes, then crawl staging (if accessible) to catch structural problems early, like missing metadata defaults or internal link gaps. After launch, compare pre and post issue patterns by template and closely monitor a short list of your top landing pages to catch regressions quickly.

Turn Your Audit Findings Into Ranking Improvements

A Semrush site audit is only as valuable as the action plan it produces. The tool does excellent work surfacing problems, but the competitive advantage comes from knowing which fixes move revenue and which ones just make the dashboard greener.

Prioritize by business impact. Cross-reference your findings with actual traffic and conversion data. And treat the health score as a directional compass.

Build the habit of monthly re-audits so you catch regressions early, and resist the urge to chase a perfect score at the expense of shipping the changes that actually matter to your bottom line. Now that you know how to use site audit in Semrush to connect technical findings to business outcomes, the only thing left is to act on what the data tells you.

Let Single Grain Turn Your Audit Into a Growth Plan

Single Grain’s SEO team helps growth-stage companies translate technical audit findings into prioritized roadmaps tied to revenue outcomes. Whether you’re wrestling with a noisy Semrush website audit or need a full technical overhaul, we build the fix list, execute the changes, and track the business impact over time.

You get a dedicated team that has driven results like a 7 times increase in AI citations in 90 days, backed by the same methodology we share with about 1.6 million monthly Marketing School podcast listeners.

Get your FREE consultation and turn your next site audit into a growth engine.

Semrush Site Audit: FAQs

• What is the site health score, and how is it calculated?

  The health score is a metric between 0-100%, which identifies the degree of optimization after the checks have been performed. It is calculated based on the number of errors or warnings on the pages.

  Errors are more impactful, and fixing them will result in higher overall health of your website. There are unique types of checks, the number of issues found in each, and a list of notices in the audit, which enhances the overall health.

• How many pages can I crawl a month in Semrush?

  With a free account, you can crawl up to 100 pages a month, while Pro, Guru and Business accounts allow 100,000, 300,000, and 1,000,000 pages, respectively, per month. Please note that if some pages are left over, they will not roll over to the next month.

• Is Semrush Site Audit Free?

  There is a free version available for the Semrush website audit with some limitations on usage. With the free version, you can crawl a maximum of hundred pages per audit, while paid users have a higher limit.

• Do large sites have more issues and a poor Semrush site health score?

  The number of pages on the website does not impact the health score of your website. However, the higher the number of website pages, the more you should be careful of the issues and structure of your website.

• How can I delete a previous site audit from my dashboard?

  If you want to delete a previous site audit history, you must delete the entire project, which removes all the site audit data. Be careful, as you cannot recover the data of your project once deleted.

• Provide a list of issues that the Semrush site audit identifies.

  Semrush site audit can identify the following issues on your website:

  • Broken links and redirects
  • Pages with slow loading times
  • Duplicate content
  • Missing or poorly optimized meta tags
  • Issues with XML sitemaps and robots.txt files
  • Pages with low word count
  • URLs with dynamic parameters
  • Pages with missing or broken images
  • Mobile usability issues
  • HTTPS implementation problems
  • Issues related to hreflang tags and international SEO
  • Thin content pages
  • Internal and external broken links
  • Pages with too many on-page links
  • Issues with pagination
  • Redirect chains or loops
  • Issues related to structured data markup
  • URLs blocked by robots.txt
  • Missing or incorrect rel=”canonical” tags

If you were unable to find the answer you’ve been looking for, do not hesitate to get in touch and ask us directly.