User experience (UX) matters to SEO. But not in the way you might think.

Google measures a small number of experience signals directly, although they’re rarely the deciding factor in who ranks first. The bigger ranking effect of UX is indirect.

For example, a page that frustrates people through poor UX leads to higher bounce rates and lower engagement – signals Google pays close attention to. Frustrated users also won’t convert and justify the traffic in the first place.

This guide separates the UX signals Google directly measures from those that indirectly affect your visibility. We’ll also cover the problems we find most often in technical audits, and how UX priorities are evolving in the AI search era.

What Google measures directly: Core Web Vitals

Core Web Vitals are the only part of the on-page user experience that Google confirms its ranking systems use. Google’s own page experience documentation is clear on this: beyond Core Web Vitals, other page experience aspects don’t directly help a site rank higher.

Core Web Vitals is based on three metrics, each measured from real Chrome users and judged at the 75th percentile of visits:

Metric What it measures “Good” threshold
Largest Contentful Paint (LCP) How long the main content takes to appear 2.5 seconds or less
Interaction to Next Paint (INP) How quickly the page responds when someone taps, clicks, or types Under 200 milliseconds
Cumulative Layout Shift (CLS) How much the layout jumps around while loading A CLS score of under 0.1

It’s also worth noting that Core Web Vitals no longer uses First Input Delay (FID) as one of its metrics, as it was replaced by INP in March 2024. While FID only timed the delay before the first interaction, INP looks at responsiveness across the whole visit, for a more well-rounded picture of UX beyond a user’s first few seconds on a page.

When you’re optimising your site for Core Web Vitals, remember:

  • It’s assessed page by page, not site-wide: Well-optimised pages in one section of your site don’t compensate for underperformers elsewhere.
  • Passing isn’t a ranking boost on its own: Google states that good Core Web Vitals scores alone don’t guarantee top rankings, so Treat Core Web Vitals as a threshold to clear, not the be-all and end-all of page optimisation.

Other commonly-listed UX tips like mobile-friendliness, HTTPS, and avoiding intrusive pop-ups are still worth getting right, but Google no longer tracks them as ranking factors in their own right. In 2023, it retired its mobile-friendly test and removed the “Good page experience” filter from Search Console.

Where UX indirectly affects rankings: how people behave after they click

The broader effect of UX on rankings comes from what searchers do once they land on a page. For years, Google declined to answer the question of whether click behaviour influenced rankings. That was until the 2023 US Department of Justice antitrust trial.

Under oath, Google’s VP of Search, Pandu Nayak, revealed the existence of NavBoost, a click-based ranking system that Google has used since around 2005. He called it one of Google’s important ranking signals.

Internal Google documentation that leaked in 2024 shows how NavBoost tells a good visit from a bad one. Among the metrics it tracks are:

  • goodClicks: Someone clicks a result and stays on the page for longer than a few seconds.
  • badClicks: Someone clicks, but then comes straight back to the results to try another page.
  • lastLongestClicks: The click where the search ended, with the searcher staying on the page and never returning to the search results. These clicks carry the strongest positive weight in NavBoost’s ranking calculations.

Why does Google put weight on these metrics? Let’s compare the experiences of two example searchers to land on your page:

  • One finds useful information on a well-optimised page, stays, and never goes back to the results. That’s exactly the kind of positive search experience that Google wants to reward.
  • The other hits a cookie wall, a full-screen newsletter pop-up, or a hero image that pushes the answer below the fold. Frustrated, they return to the results to look for another page, or give up entirely. These are the kinds of experiences Google would rather avoid.

This is why UX and SEO can’t be separated, and why a page that ranks for a query it doesn’t satisfy is living on borrowed time. A page only gets clicks if it already appears in search results. Once it gets those clicks, UX decides whether it stays there.

Six UX problems we find in technical audits

Most UX problems that hurt search performance stem from design or development decisions made for good reasons, with an SEO cost nobody spotted. Here are the UX issues we see most often when we’re carrying out technical content audits, and how to fix them:

Problem What the visitor experiences What it costs in search The fix
Lazy loading applied to the hero image A blank space where the main image should be LCP fails, often on every page using that template Load above-the-fold images eagerly and give the hero fetchpriority=”high”; lazy load only what sits below the fold
Cookie banners, ads, or embeds with no reserved space Text jumps as they load, and they tap the wrong link CLS fails; more people return to the results page Reserve fixed dimensions for anything that loads late
Too many third-party scripts (tag managers, chat widgets, A/B testing tools) Filters and “add to basket” buttons lag or freeze INP fails on the pages that convert Audit tags quarterly, remove what nobody uses, and defer the rest
Infinite scroll with no paginated URLs Smooth browsing, no visible UX issue Googlebot doesn’t scroll, so products past the first batch may never be discovered Back infinite scroll with real, linked page URLs
Full-screen pop-ups on arrival from search A newsletter sign-up as the first thing they see Google’s intrusive interstitials guidance; more quick returns to the results page Delay pop-ups, or use a banner that leaves the content visible
Useful info buried under a long introduction Scrolling past irrelevant copy to find what they actually searched for Fewer satisfied clicks, and less chance of being quoted in AI search Put the answer in the first paragraph, then expand on it

None of these UX issues show up directly in a rankings report, but they do surface when real users interact with a page. A developer testing on a high-end laptop and fast Wi-Fi will rarely see a layout shift or a frozen filter panel. A customer on a five-year-old Android phone with a patchy connection sees both, presses back, and becomes one of the “badClicks” NavBoost records.

To get UX right, test across a variety of screen sizes and connection speeds, and note any new problems you encounter. You can also check the field data in Search Console’s Core Web Vitals report to see how many real users run into the same problems.

Once you find these issues, most are quick fixes, like changing an attribute, reserving space, or removing a script. The real cost comes from letting them go unnoticed.

Outdated UX-for-SEO ideas to stop spending time on

Some advice about UX and SEO has outlived the evidence behind it. Here are three often-quoted pieces of advice that aren’t quite as helpful as they might seem.

“You need a perfect Lighthouse score”

Lighthouse runs a lab test on one simulated device, but Google ranks pages based on field data from real Chrome users. That means a page can score 98 in Lighthouse and still fail INP for people on older devices. Lighthouse is useful for diagnosis, but only alongside Search Console’s Core Web Vitals report and Chrome UX Report data.

“Longer content always ranks better”

Studies have historically found that top-ranking pages often average over 1,500 to 1,800 words, but this isn’t always the case.

Longer articles naturally lend themselves to in-depth coverage and time spent on-page, which can send positive ranking signals. However, Google’s helpful content guidance says it has no preferred word count, and increasing content length without adding useful information makes the answer users are looking for harder to find, which can negatively affect UX.

For example, if a user is only searching for a quick factual answer like “What is the capital of France?”, a concise, helpful response will always be preferred to a bloated 2,000-word essay.

“Internal links help manage crawl budget”

It’s often said that strategically placed internal links can help direct GoogleBot to your high-value pages, instead of wasting crawl budget on low-priority URLs. Crawl budget is a real constraint for very large sites, such as marketplaces and publishers with hundreds of thousands of URLs. Most sites, however, are nowhere near large enough for crawl budget to be an issue.

If you’re not sure which applies to you, server log analysis shows how often Googlebot reaches your key pages. Internal links are still worth adding, but they primarily benefit real users.

UX in the AI search era

AI search means optimising your UX for a whole new kind of visitor. Before a real person ever finds your page, an AI system may have already analysed it, pulled out a passage, and used it as part of its answers. Many of those visits never appear in your analytics, which is why we built a method to see when ChatGPT uses your content.

Here’s what to consider when optimising your UX for AI search:

  • Structure: Clear headings with a concise, direct answer underneath give an AI system a clean passage to quote.
  • Rendering: Many AI crawlers only read the HTML your server sends and don’t run JavaScript. If your product details or prices only appear after scripts run, those crawlers may see an empty page.
  • Arrival: People who click through from an AI answer have already read a summary. They then expect the page to pick up where the answer left off, with additional detail and unique insights.

Good UX used to mean making a page easy for people and readable for Googlebot. While that’s still important, in the AI search era, it also means making your expertise easy to extract, so your brand appears in their answers. Our AI search team works on exactly this.

Where to start with strong UX and SEO

UX matters to SEO in two key ways. Core Web Vitals are the easiest to measure, and a clear threshold you need to meet. Searcher satisfaction is the signal that helps you maintain the rankings you’ve earned. Most sites over-invest in the first and barely measure the second.

If you only have a day to spend on UX, here’s what we recommend:

  1. Open the Core Web Vitals report in Search Console and list the page templates that fail on mobile. Fix the ones that carry the most organic traffic first.
  2. Pull your top 20 organic landing pages and load each one on an old phone or tablet. Note anything that blocks or delays the answer the searcher came for.
  3. Check whether your key content is in the HTML the server sends, or only appears after JavaScript runs.
  4. Rewrite the opening of any page that makes people scroll to find the answer.

Let SALT transform your UX for SEO

If your UX findings point to deeper problems in templates, rendering, or site architecture, that’s where a technical SEO audit can help. We look at your site the way your visitors and search systems do, find the UX issues costing you visibility, and give your developers fixes in priority order, starting with the pages that drive revenue.

Talk to our team about what yours would cover.