How to Do a Website Audit to Improve SEO and UX

Your website might be losing traffic right now and you wouldn't even know it. Broken links, slow pages, thin content, confusing navigation - these issues quietly kill your rankings and push visitors away before they ever convert.

That's where a website audit comes in.

A proper audit tells you exactly what's broken, what's underperforming, and what you need to fix to climb search rankings and keep visitors engaged. Whether you're an SEO pro who's done this a hundred times or a business owner running your first check, this guide walks you through the whole process clearly.

Let's get into it.

A website audit is a full review of your site's health. It looks at every factor that affects how well your site ranks in search engines and how easy it is for real people to use.

Think of it like a medical checkup for your website. You're not waiting until something breaks. You're catching problems early, before they cost you traffic, leads, or revenue.

In 2026, this matters more than ever. Google's ranking systems have gotten sharper. AI-powered search results are reshaping how people find websites, and user expectations around page speed and mobile experience are at an all-time high. A site that was "good enough" two years ago might now be actively hurting your business.

SEO vs. UX: Two Sides of the Same Coin

SEO and UX aren't separate problems. They're connected.

Google ranks pages partly based on how users behave on them. If visitors land on your page and bounce immediately because it's slow or confusing, that's a signal. Google notices. Your rankings drop. You get fewer visitors, and the cycle continues.

A solid website audit looks at both layers:

• SEO layer: crawlability, indexability, meta tags, page speed, backlinks, content quality
• UX layer: navigation, mobile usability, visual clarity, Core Web Vitals, conversion paths

You can't fix one and ignore the other. Both need attention.

How Often Should You Run One

Most SEO professionals recommend a full website audit at least once a quarter, but honestly, for sites publishing content regularly or running active campaigns, once a month makes more sense.

At minimum, run one:

• Before and after a site redesign
• After a significant Google algorithm update
• When you notice a sudden traffic drop
• Before launching a new SEO content push

The point isn't to audit for the sake of it. It's to stay ahead of issues that compound over time.

If you're serious about keeping your site in top shape, you need a tool that does more than just crawl for broken links. Semly Pro was built to handle the full picture - content audits, AI visibility tracking, competitor detection, and ongoing SEO monitoring, all from one place.

It's not just an audit tool. It's a platform that helps you act on what you find.

What Semly Pro Covers

Here's what you get across Semly Pro's plans:

• Content audits per month: 15 on Pro, 40 on Business Pro, unlimited on Managed SEO
• AI visibility score to track how your site appears in AI-powered search results
• Competitor detection to see who's outranking you and why
• AI citation tracking so you know when and where your content gets referenced
• LLMs. txt generation for advanced AI search optimization
• Google Search Console and Google Analytics 4 integration
• CMS publishing to 12 platforms so your fixed content goes live fast

Plans start at €139/mo for the Pro plan (solo marketers and small businesses), €229/mo for Business Pro (agencies and growing teams), and €469/mo for Managed SEO where Semly Pro's team runs everything for you.

There's a 7-day free trial on Pro with no commitment required. Worth trying before you commit.

How It Compares to Other Tools

See how Semly Pro stacks up against other tools commonly used for auditing and SEO work:

The gap is clear. Most tools handle one part of the job. Semly Pro handles the whole thing.

Ready to actually run one? Here's a process that works for sites of any size, whether you're auditing a 10-page business site or a 10,000-page e-commerce store.

Step 1: Set Your Goals and Scope

Before you touch a single tool, get clear on what you're trying to fix.

Are you worried about a traffic drop? Slow page speed? Poor mobile experience? Low conversion rates? Each of those issues calls for a slightly different focus during your audit.

Also decide on scope. Are you auditing the whole site or just a key section, like the blog or product pages? Auditing everything at once sounds thorough, but it often leads to an overwhelming list you'll never fully action.

Pro tip: Start with your highest-traffic pages if you're short on time. Fixing problems on pages that already get visits tends to have the biggest and fastest impact.

Step 2: Crawl Your Website

A crawl is how you see your site the way search engines see it. Your crawl tool visits every URL, follows every link, and reports back on what it finds.

What to look for during a crawl:

• Broken links (404 errors)
• Redirect chains and loops
• Duplicate URLs or content
• Pages blocked by robots. txt (accidentally or intentionally)
• Missing or duplicate title tags and meta descriptions
• Orphaned pages with no internal links pointing to them

Most tools will flag these automatically. Your job is to triage them, not panic at the full list. Some issues are critical. Others are minor and can wait.

Step 3: Check Your Technical SEO

Technical SEO is the foundation everything else sits on. If search engines can't crawl and index your pages properly, great content won't save you.

Key things to check here:

• XML sitemap: Is it up to date? Is it submitted to Google Search Console?
• Robots. txt: Are you accidentally blocking important pages?
• HTTPS: Is your entire site served securely? Mixed content issues can still hurt you.
• Canonical tags: Are you using them correctly to avoid duplicate content penalties?
• Structured data / schema: Are your rich results eligible? Is your schema valid?
• Mobile-friendliness: Google uses mobile-first indexing. If your mobile version is broken, you're penalized across the board.
• Page speed: Slow sites lose rankings and users. Both.

Google Search Console is free and should be your first stop. It tells you which pages are indexed, which aren't, and why. Don't skip it.

Step 4: Audit Your On-Page Content

This is where you look at the actual words on your pages and whether they're working hard enough.

Content quality matters more than ever in 2026. Google's systems are better at identifying thin, unhelpful, or duplicate content, and AI-generated search results are pulling from sites that demonstrate genuine expertise and depth.

Check each key page for:

• Title tag and H1: Do they include the target keyword naturally? Are they compelling enough to earn a click?
• Meta description: Is it written to attract clicks, not just stuff keywords?
• Content depth: Does the page actually answer the reader's question, or does it skim the surface?
• Keyword targeting: Is there a clear primary keyword? Are you targeting too many at once (keyword cannibalization)?
• Content freshness: Are statistics, dates, and examples still current?
• Internal linking: Are you linking to related pages where it makes sense?

Honestly, this step takes the longest, but it's also where the biggest wins are hiding.

Step 5: Review Your UX and Core Web Vitals

Good content on a bad-experience site still loses. Users won't wait. They'll leave.

Core Web Vitals are Google's official UX metrics. They measure three things:

• LCP (Largest Contentful Paint): How fast does the main content load? Target under 2.5 seconds.
• INP (Interaction to Next Paint): How quickly does your page respond to user input? Target under 200ms.
• CLS (Cumulative Layout Shift): Does the page jump around as it loads? Target a score under 0.1.

Beyond Core Web Vitals, look at the broader UX experience:

• Is your navigation clear and logical?
• Can users find what they need in three clicks or fewer?
• Are your CTAs visible and compelling?
• Does the site work well on a phone?
• Are there any confusing layouts or broken visual elements?

Real talk: most businesses focus almost entirely on SEO during audits and forget UX entirely. Don't be that business. Both matter, and they reinforce each other.

Step 6: Analyze Backlinks and Off-Page Signals

Your backlink profile tells Google how much other sites trust yours. A website audit isn't complete without looking at this.

What to check:

• Total backlinks and referring domains: Are these growing, stable, or declining?
• Link quality: Are your links coming from relevant, authoritative sites? Or spammy directories?
• Toxic or spammy links: These can drag your site down. You may need to disavow them.
• Anchor text distribution: Is it natural, or over-optimized with exact-match keywords?
• Lost links: Have you recently lost links from high-authority sites? Why?

You won't fix your backlink profile overnight, but knowing where you stand is the starting point for any link-building strategy.

Step 7: Build Your Fix List and Prioritize

Here's where most people stumble. They finish the audit, stare at a list of 300 issues, and freeze.

Don't do that.

Sort your issues into three buckets:

1. Critical (fix this week): 404 errors on high-traffic pages, pages accidentally blocked from indexing, broken checkout flows, security issues
2. Important (fix this month): Slow page speeds, missing meta tags, thin content on key pages, broken internal links
3. Nice to have (fix when you can): Minor duplicate content, minor UX tweaks, image alt text on low-traffic pages

Work the list in order. Don't spend three hours optimizing an image on a page that gets five visits a month when your homepage has a redirect loop.

Use this when you're running your next audit. Print it out, paste it into a doc, or check things off in your project management tool.

Technical SEO Checklist

• XML sitemap is current and submitted to Google Search Console
• Robots. txt isn't blocking important pages
• All pages served over HTTPS with no mixed content warnings
• No crawl errors flagged in Google Search Console
• Canonical tags in place on duplicate or near-duplicate pages
• Schema markup valid and implemented on key page types
• Mobile usability test passed
• No broken 404 links on key pages
• No redirect chains longer than one hop
• Site loads under 3 seconds on mobile

On-Page SEO Checklist

• Every page has a unique, keyword-relevant title tag
• Every page has a compelling meta description under 160 characters
• H1 tag present on every page (and only one per page)
• Target keyword appears naturally in first 100 words
• No keyword cannibalization across pages targeting the same term
• Content is original, useful, and actually answers the user's question
• Images have descriptive alt text
• Internal links connect related pages with descriptive anchor text
• Content is updated with current information (not outdated stats or dates)

UX and Performance Checklist

• LCP under 2.5 seconds
• INP under 200ms
• CLS score under 0.1
• Navigation is clear and consistent across all pages
• CTAs are visible above the fold on key pages
• Forms work on mobile and desktop
• No layout shifts or broken images on mobile
• Site accessible to users with disabilities (WCAG 2.1 basics met)
• Font sizes readable on mobile without zooming
• Contact and conversion paths are easy to find

Tools matter, but not all audit tools are built the same. Some are great at crawling. Some shine at content analysis. Very few do everything well.

What to Look for in an Audit Tool

Before you pick a tool, ask yourself these questions:

• Does it cover both technical SEO and content auditing?
• Does it integrate with Google Search Console and Analytics?
• Can it track changes over time, so you know if things are getting better or worse?
• Does it flag issues clearly, or just dump data at you?
• Does it offer AI-specific visibility tracking for 2026's search environment?

That last point is worth expanding on. in 2026, AI-generated search results (from ChatGPT, Perplexity, Google's AI Overviews) are becoming a significant traffic source. If your audit tool doesn't track how your site appears in these environments, you're missing a growing piece of the picture.

Semly Pro is currently one of the only platforms that tracks AI visibility alongside traditional SEO metrics. That's not a small thing anymore.

Tool Comparison Table

Here's a side-by-side look at how popular tools handle key audit functions:

Bottom line: if you want a tool that handles auditing AND helps you act on the results with content creation, AI tracking, and publishing, Semly Pro is the only option on this list that covers all of it.

Knowing how to do a website audit is one thing. Knowing what trips people up is another. Here are the mistakes that waste time or make things worse.

Auditing without a clear goal. Running a full crawl and staring at 500 issues isn't a strategy. Know what you're looking for before you start. Are you chasing organic traffic? Fixing a conversion problem? Speed issues? Start there.

Fixing low-priority issues first. It's tempting to fix whatever's easiest, but adding alt text to 200 images on low-traffic pages won't move the needle like fixing a crawl block on your category pages. Focus on impact, not volume.

Ignoring mobile entirely. Desktop audits aren't enough. Over 60% of web traffic in 2026 comes from mobile. If you're only testing your desktop experience, you're missing the majority of your users.

Running one audit and forgetting about it. A website audit isn't a one-time event. Your site changes. Google's algorithms change. Competitors change. A quarterly review, at minimum, keeps you from falling behind without realizing it.

Not checking AI search visibility. This is the 2026 mistake most teams are making right now. Traditional search isn't going away, but AI-generated results are increasingly eating into organic click-through rates. If your audit doesn't include how your site appears in ChatGPT or Google's AI Overviews, you're working with incomplete data.

Treating UX as someone else's problem. SEO teams sometimes hand off UX issues to design teams and consider them "done." But if those UX fixes never happen or take six months, your rankings suffer in the meantime. Keep UX on your audit radar and follow through.

Not documenting your findings. An audit that lives in your head or in a messy spreadsheet doesn't help anyone. Document every finding clearly, assign owners, and set deadlines. The audit is only as valuable as the action it drives.

Sound familiar? Most of these mistakes are about process, not knowledge. The mechanics of a website audit aren't complicated. Following through consistently is the hard part.

What is a website audit?

A website audit is a full review of your site's technical health, content quality, and user experience. It identifies issues that hurt your search rankings and drive visitors away, giving you a clear list of what to fix and in what order.

How long does a website audit take?

It depends on your site's size. A small 20-page business site might take two to three hours to audit properly. A large e-commerce site with thousands of pages could take several days. Using a tool like Semly Pro that automates crawling and content checks significantly cuts down that time.

How often should I do a website audit?

At minimum, once per quarter. If you're publishing new content regularly, running paid campaigns, or operating in a competitive space, monthly audits give you a better edge. You should also run one immediately after a major Google algorithm update or a sudden traffic drop.

What's the difference between an SEO audit and a website audit?

An SEO audit focuses specifically on factors that affect search rankings, like crawlability, keyword targeting, backlinks, and technical SEO. A website audit is broader and also includes UX, performance, and conversion factors. in practice, a good website audit covers both.

Can I do a website audit for free?

Yes, partially. Google Search Console is free and gives you indexing data, crawl errors, and Core Web Vitals. Google PageSpeed Insights is free for performance testing, but for a deep, full-site audit that covers content, backlinks, and competitor analysis, you'll want a dedicated tool. Semly Pro offers a 7-day free trial on the Pro plan so you can see what a proper audit looks like without spending anything upfront.

What tools do I need to run a website audit?

You don't need dozens of tools. At a minimum, you need:

• Google Search Console (free, for indexing and error data)
• Google Analytics 4 (free, for traffic and behavior data)
• A crawl and content audit tool like Semly Pro
• Google PageSpeed Insights or a similar speed tester

Semly Pro integrates directly with Search Console and GA4, so you can pull everything into one place rather than jumping between tabs.

What is a content audit within a website audit?

A content audit looks at every piece of content on your site and evaluates whether it's performing. You're checking things like: Is this page ranking for anything? Is it getting traffic? Does it answer the user's question well? Is it outdated? Should it be updated, merged with another page, or removed entirely? It's one of the most impactful parts of the whole process.

How do I know which issues to fix first?

Prioritize by impact. Anything blocking search engines from crawling or indexing your key pages is critical and needs to go first. After that, focus on issues affecting your highest-traffic pages. Lower-traffic pages with minor issues can wait. Categorize your list into critical, important, and nice-to-have buckets and work through them in order.

What are Core Web Vitals and why do they matter for a website audit?

Core Web Vitals are Google's official metrics for page experience. They measure load speed (LCP), interactivity (INP), and visual stability (CLS). Google uses these as ranking signals, which means poor scores can directly lower your position in search results. Every website audit should include a Core Web Vitals check as a standard step.

Does Semly Pro offer a managed website audit service?

Yes. Semly Pro's Managed SEO plan at €469/mo includes everything in Business Pro plus a dedicated SEO strategist who runs your content audits, AI visibility tracking, and optimization work for you. It's ideal for businesses that want ongoing audit coverage without building an in-house SEO team. You can get started by booking a call with the Semly Pro sales team.