Core Web Vitals Optimisation

Your Site Loads in 4.2 Seconds. Your Competitors Load in 1.8. How Much Revenue Is That Costing You

Google ranks faster sites higher. Users abandon slow pages. Your competitors who fixed their Core Web Vitals six months ago are capturing traffic that should be yours.

Your site works. It’s not broken. But “works” and “performs” are different things. Every tenth of a second in load time affects conversion rates, search rankings, and revenue.

We optimise Core Web Vitals so your site doesn’t just pass Google’s thresholds but it exceeds them whilst maintaining tracking accuracy, accessibility, and functionality.

Let us audit your site performance and we’ll show you what you’re missing.

What Wonderful Core Web Vitals Optimisation Looks Like

Most businesses think passing Core Web Vitals is about hitting Google’s minimums. That’s table stakes. Proper optimisation means your site loads faster than competitors whilst maintaining everything that makes it effective.

Here’s what a wonderful Core Web Vitals optimisation delivers:

  • Images and hero content load instantly, even on 3G connections
  • Critical rendering path optimised so users see content before anything else loads
  • Resource prioritisation ensuring important elements appear first, not last
  • Interactions respond immediately – buttons, forms, navigation all feel instant
  • JavaScript execution optimised so the main thread stays responsive
  • Third-party scripts deferred or removed when they block user interactions
  • Page layouts stable – no content jumping when fonts, images, or ads load
  • Reserve space for dynamic content so nothing shifts unexpectedly
  • Smooth user experience from first paint to full page load
  • Optimisations tested across devices, browsers, and connection speeds (not just lab conditions)
  • GA4 tracking configured for continuous monitoring segmented by device, browser, and geography
  • Resilient architecture maintaining speed even when traffic spikes or third-party services slow

From Slow and Unresponsive to Fast and Competitive in Six Weeks

Get in Touch

Discovery Call

Get in touch and we’ll arrange an initial discovery call. We get every project is unique so we like to understand the current state of play from you. However, below details our standard process for our Core Web Vitals optimisation.

Get in Touch

Discovery Call

Get in touch and we’ll arrange an initial discovery call. We get every project is unique so we like to understand the current state of play from you. However, below details our standard process for our Core Web Vitals optimisation.

Week 1-2

Performance Audit & Strategy

Comprehensive site audit measuring real-world Core Web Vitals performance across devices and connections. Identify specific bottlenecks blocking speed improvements. Custom optimisation roadmap prioritising fixes by impact and implementation complexity.

Week 1-2

Performance Audit & Strategy

Comprehensive site audit measuring real-world Core Web Vitals performance across devices and connections. Identify specific bottlenecks blocking speed improvements. Custom optimisation roadmap prioritising fixes by impact and implementation complexity.

Week 3-4

Implementation & Testing

Technical optimisations addressing LCP, INP, and CLS issues systematically. Image compression, lazy loading, and resource prioritisation configured. JavaScript and CSS optimised for minimal render-blocking. Comprehensive staging testing before production deployment.

Week 3-4

Implementation & Testing

Technical optimisations addressing LCP, INP, and CLS issues systematically. Image compression, lazy loading, and resource prioritisation configured. JavaScript and CSS optimised for minimal render-blocking. Comprehensive staging testing before production deployment.

Week 5-6

Monitoring & Documentation

Performance monitoring configured to track Core Web Vitals continuously with automated alerts. Team training on maintaining optimisations during future updates. Documentation handoff detailing what was changed and why it matters.

Week 5-6

Monitoring & Documentation

Performance monitoring configured to track Core Web Vitals continuously with automated alerts. Team training on maintaining optimisations during future updates. Documentation handoff detailing what was changed and why it matters.

Complete!

What Happens Next?

Your site ranks higher in search results because Google rewards faster experiences. Conversion rates improve because users don’t abandon slow pages. You maintain performance advantages through monitoring that catches regressions before they impact revenue.

Complete!

What Happens Next?

Your site ranks higher in search results because Google rewards faster experiences. Conversion rates improve because users don’t abandon slow pages. You maintain performance advantages through monitoring that catches regressions before they impact revenue.

What Good-Enough Setups Leave Behind

The Cost of Waiting

Every month with unoptimised Core Web Vitals:

No optimisation may give you acceptable. Proper Core Web Vitals optimisation gives you a competitive advantage.

Don’t wait around expecting basic speed fixes to move the needle. Get in touch, let’s map where you are and where you need to go to get the most out of your site performance.

Contact Form

The team is friendly, approachable and their knowledge and experience means that they genuinely understand what we’re trying to achieve.

– Richard S, Head of Organic Performance at Betfred

Core Web Vitals Optimisation FAQs

How long does Core Web Vitals optimisation take?

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Implementation takes 4-6 weeks from kickoff to final handoff. Week 1-2 is comprehensive performance audit identifying specific bottlenecks across devices and connection speeds. Weeks 3-4 are technical implementation addressing LCP, INP, and CLS systematically with staging testing. Weeks 5-6 are monitoring setup, team training, and documentation handoff. We don’t rush – getting performance right whilst maintaining functionality matters more than quick fixes that break tracking or accessibility.

How much does Core Web Vitals optimisation cost?

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Most implementations range from £4k-£12k depending on site complexity and current performance state. Simple WordPress sites with basic functionality sit at the lower end. Complex ecommerce platforms with extensive third-party integrations, dynamic content, and multiple tracking scripts cost more because optimisation requires balancing performance against maintaining critical capabilities. We provide fixed quotes after discovery audit so you know exact costs before work begins.

Can you help if our site is already reasonably fast?

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Yes. “Reasonably fast” usually means passing Google’s minimum thresholds – but that’s not competitive advantage. We optimise sites scoring “Good” on Core Web Vitals to score “Excellent” consistently across all devices and connections. The performance gap between acceptable and exceptional directly impacts conversion rates and search rankings. If your competitors are faster, they’re capturing opportunities that should be yours.

Will optimisation break our tracking or functionality?

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No. We combine development and analytics expertise, so optimisations preserve measurement accuracy whilst improving speed. Our team understands which scripts can be deferred, which must load immediately, and how to balance performance requirements with tracking needs. We test comprehensively in staging before production deployment, and we verify that GA4, GTM, advertising pixels, and conversion tracking all function correctly post-optimisation.

What specifically gets optimised?

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Image compression and next-gen format conversion (WebP, AVIF) with intelligent fallbacks. JavaScript bundle size reduction and code splitting for faster parsing. CSS optimisation removing unused styles and critical path rendering. Third-party script management deferring or removing blocking resources. Resource prioritisation ensuring above-the-fold content loads first. Server response time improvements through caching and CDN configuration. Layout stability fixes preventing content shift during page load.

Do you optimise for mobile specifically?

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Yes. Mobile performance optimisation is critical because mobile users represent your highest-growth audience segment and experience your slowest performance. We test across actual mobile devices and connection speeds (3G, 4G, 5G) not just Chrome DevTools simulations. Optimisations address mobile-specific challenges like limited CPU, restricted bandwidth, and touch interaction responsiveness. Your mobile Core Web Vitals scores improve as much as desktop, not as an afterthought.

Will you train our team on maintaining performance?

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Yes. We provide both live sessions and recorded training covering performance fundamentals, common pitfalls, and how to test changes before deployment. Your development team learns which optimisations to maintain, how to evaluate new plugins or scripts for performance impact, and when to contact us for complex situations. The goal is knowledge transfer-you own the performance strategy, not just the implementation.

What happens to performance when we add new features?

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Performance monitoring configured during implementation catches regressions immediately with automated alerts when Core Web Vitals scores decline. Documentation details performance budgets for different page types so your team knows acceptable thresholds. We provide guidelines for evaluating new plugins, third-party scripts, or features before adding them. Most clients schedule quarterly performance reviews ensuring ongoing optimisation as sites evolve – but that’s optional.

Do you implement GA4 tracking for Core Web Vitals monitoring?

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Yes. We configure GA4 tracking during optimisation work capturing real user Core Web Vitals data – LCP, INP, CLS, and TTFB segmented by device, browser, geography, and page path. This goes beyond lab test scores providing continuous monitoring of actual user experience. You’ll see which specific device/browser combinations have performance issues, whether problems affect all users or specific segments, and how performance changes correlate with conversion rates. Implementation uses custom GTM templates requiring no development work.

How do you balance performance with marketing tracking?

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We combine development and analytics expertise, so optimisations consider both speed and measurement accuracy. Some marketing scripts legitimately need to load early for tracking accuracy-we preserve those whilst deferring or removing unnecessary ones. We work with your marketing team understanding which pixels, tags, and scripts are critical versus legacy implementations nobody uses anymore. The result is faster performance without sacrificing measurement capability.

Can you optimise WordPress sites?

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Yes. WordPress-specific optimisations include plugin audits removing bloat, database query optimisation, object caching implementation, and theme performance improvements. We understand WordPress architecture so optimisations work with your existing plugins and customisations rather than breaking them. Most WordPress sites achieve significant Core Web Vitals improvements without platform migrations or complete rebuilds-though we’ll recommend that if current architecture fundamentally blocks performance.

What about Shopify or other platforms?

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Yes. We optimise Shopify, Shopify Plus, WooCommerce, and custom platforms. Each has platform-specific performance considerations-Shopify’s app ecosystem often introduces performance bottlenecks, WooCommerce database queries need optimisation, custom platforms require architectural assessment. Our approach adapts to your platform whilst maintaining Core Web Vitals focus. Some platforms impose constraints (Shopify limits JavaScript control), but significant improvements remain possible within those boundaries.

Do you provide ongoing performance monitoring?

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Yes. We configure automated monitoring tracking Core Web Vitals continuously with alerts when scores decline below thresholds. You receive monthly performance reports showing trends, identifying regressions, and recommending optimisations. Ongoing support packages include quarterly performance reviews, continuous monitoring, and priority assistance when issues emerge. Many clients start with implementation only, then add monitoring once they experience performance advantages and want to maintain them.

How does Core Web Vitals affect SEO?

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Google’s page experience signals include Core Web Vitals as ranking factors-faster sites rank higher than slower competitors with similar content quality. The impact compounds: better rankings drive more traffic, better performance converts that traffic more effectively. Mobile search particularly rewards performance because mobile users abandon slow experiences faster. Optimising Core Web Vitals improves search visibility, user experience, and conversion rates simultaneously-not just one in isolation.

Why choose Wonder Agency for Core Web Vitals optimisation?

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We engineer performance considering development, analytics, accessibility, and sustainability together. Our development team understands tracking requirements so optimisations preserve measurement accuracy. Our analysts implement GA4 tracking for Core Web Vitals monitoring during optimisation work – you get real user performance data segmented by device, browser, and geography, not just lab test scores. This integration means performance improvements become measurable business outcomes – you can prove ROI of speed optimisations through conversion rate changes, not just PageSpeed scores.

Can you guarantee specific Core Web Vitals scores?

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We can’t guarantee exact scores because performance depends on factors beyond our control-hosting infrastructure, third-party service reliability, content management practices. We can guarantee comprehensive optimisation following industry best practices, systematic testing before deployment, and monitoring catching regressions. Most sites achieve “Good” ratings across all Core Web Vitals metrics. Some achieve “Excellent” consistently. Your current performance baseline and architectural constraints determine realistic targets.

Do you offer ongoing support for Core Web Vitals?

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Yes. Ongoing support packages include continuous performance monitoring, monthly reports, quarterly optimisation reviews, and priority assistance when issues emerge. Most clients either schedule quarterly performance check-ups or subscribe to ongoing monitoring ensuring regressions get caught immediately. One-time optimisation works if your site remains relatively stable. Ongoing support makes sense if you regularly add features, run seasonal campaigns, or want guaranteed performance maintenance.

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