Page experience signals and your Google Ads performance
Page experience is Google's framework for measuring how users experience a webpage - beyond just the content. It covers Core Web Vitals, mobile usability, HTTPS, and absence of intrusive interstitials. These signals matter for both SEO and paid search, and the overlap is worth understanding.
Most advertisers treat SEO and paid search as separate channels with separate optimisation priorities. Page experience is one of the clearest examples of where this separation breaks down. A slow landing page with poor mobile usability does not just rank lower organically - it receives a lower landing page experience score in Google Ads, which reduces your Quality Score, which increases your CPC. The cost of ignoring page experience is paid in both organic visibility and paid search efficiency.
How landing page experience feeds into Quality Score
Google assesses landing page experience as one of the three Quality Score components. The assessment considers: how relevant the page content is to the ad and keyword that triggered it, how fast the page loads, whether the page is mobile-friendly, and how easy it is for users to navigate the page and find what they are looking for. A page that loads in 5 seconds, is difficult to read on mobile, and sends paid traffic to a generic homepage rather than a relevant landing page will receive a below-average landing page experience rating. That directly increases the CPC you pay in every auction that keyword enters.
Core Web Vitals in paid search context
Largest Contentful Paint measures how quickly the main content of your page loads. Interaction to Next Paint measures how responsive the page is to user input. Cumulative Layout Shift measures visual stability - whether elements on the page move around as it loads. Poor scores on any of these damage both organic rankings and paid quality scores. The good news is that improvements benefit both channels simultaneously. Fixing your LCP score does not just improve one metric - it improves user experience, conversion rate, Quality Score, and organic rankings all at once.
Intrusive interstitials
Google penalises pages that use interstitials - popups and overlays - that block the main content on mobile. This applies to cookie consent banners that cover the full screen, email capture popups that trigger immediately on landing, and promotional modals that require dismissal before content is visible. If your paid search landing pages use any of these, you are paying a penalty in both Quality Score and user experience terms. Cookie banners need to be compliant but they should not block content access. Email capture should trigger after engagement, not immediately on arrival.
The practical audit
Run your key paid search landing pages through Google PageSpeed Insights and Google's Mobile-Friendly Test. Look at the specific issues identified - not the overall score but the individual recommendations. Prioritise the highest-impact changes: image optimisation, render-blocking JavaScript removal, and mobile responsiveness are consistently the three highest-impact fixes across most sites. Work through these methodically and measure the Quality Score impact over the following 30 days.
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