Slow pages lose rankings and users in equal measure. We diagnose and fix the LCP, CLS, and INP issues holding your clients back — with real-world improvements measured in field data, not just lab scores.
Perfect For
Sites failing Core Web Vitals in Search Console and losing rankings to faster competitors in the same niche
E-commerce stores where slow load times are measurably hurting conversion rates and bounce rates on product and category pages
WordPress and WooCommerce sites bloated with plugins, unoptimized images, and render-blocking third-party scripts
Sites that recently passed a redesign or developer handoff and were never performance-tested before going live
High-traffic landing pages where every hundred milliseconds of load time is costing real conversion volume and paid media efficiency
About This Service
Core Web Vitals are a set of real-world performance metrics that Google uses as a confirmed ranking signal. The three metrics that matter are Largest Contentful Paint (LCP) — how quickly the main content of a page loads for a real user; Cumulative Layout Shift (CLS) — how much the page layout jumps around unexpectedly as it loads; and Interaction to Next Paint (INP) — how quickly the page responds to user interactions like clicks and taps. Each metric has a threshold: LCP under 2.5 seconds, CLS under 0.1, and INP under 200ms are the targets for a "Good" rating. Failing any one of them means the page is underperforming on a confirmed ranking factor and providing a demonstrably worse user experience than passing competitors.
The challenge with Core Web Vitals is that Google evaluates performance using field data — real measurements collected from Chrome users visiting actual pages — rather than lab tools like PageSpeed Insights or Lighthouse. A page can score 90+ in a lab test and still fail CWV in the field if the lab conditions don't reflect how real users experience the page with third-party scripts, slow connections, and ad networks running. Genuine optimization requires understanding both — identifying what the lab data reveals about code-level issues and understanding how those issues manifest in real-world field data. This service addresses both dimensions: a thorough diagnostic of the technical causes behind each failing metric, followed by a structured implementation plan that closes the gap between current performance and the "Good" thresholds in real user data.
LCP target — the largest content element must load within 2.5 seconds for a "Good" rating
White-labeled deliverables under your agency brand
One-time project pricing — no retainer required
Scope of Work
A systematic, metric-by-metric diagnosis of every performance issue on the site — followed by a prioritized remediation plan that gets you to "Good" across all three Core Web Vitals.
Often the biggest culprits
Deliverables
Every deliverable is white-labeled and ready to hand directly to your client under your agency branding.
Performance audit report with field data baseline, LCP, CLS, and INP scores across key page templates
Root cause analysis per failing metric — not just scores, but the specific code and configuration causing each issue
Prioritized remediation plan with estimated impact per fix and developer-ready implementation instructions
Image optimization checklist and format conversion recommendations with tooling guidance
Third-party script impact report identifying the heaviest offenders and recommended loading strategies
Post-implementation benchmark guidance so the team can verify improvements in field data after fixes are deployed
Try Before You Commit
Not ready for a full retainer? Order this as a standalone service on a single client site. No commitment required. See the quality of the work before deciding on a longer engagement.
One-time project pricing per site, billed to your agency at wholesale. You set your own margin.
8–10 hrs
14–18 hrs
28–35 hrs
Common Questions
Possibly. PageSpeed Insights uses simulated lab conditions — a throttled mobile connection tested from a single location, with no third-party scripts that require authentication and no ad network running. Google evaluates Core Web Vitals using field data from the Chrome User Experience Report (CrUX), which aggregates real measurements from real users on real connections with your live page fully loaded. A site can score green in the lab and still fail field data thresholds if ad networks, chat widgets, or A/B testing scripts add significant real-world load. We assess both and identify the gap between the two, which is often where the most impactful fixes live.
CWV are a confirmed ranking signal but not the dominant one — content relevance and authority still outweigh performance in most competitive searches. The real-world impact of CWV is most pronounced in two situations: when two pages are closely matched on content and authority, where performance becomes the tiebreaker; and on mobile, where Google's algorithms place greater weight on load experience. Beyond rankings, the business case for performance is often stronger on the UX side — Google's own research consistently links faster LCP and lower CLS to measurably higher conversion rates and lower bounce rates, especially on e-commerce and landing pages.
INP (Interaction to Next Paint) is consistently the most difficult because it requires understanding JavaScript execution patterns, main thread blocking, and how the browser handles user interaction events — areas that often require coordination with developers. LCP is the most common failure and usually the highest-impact fix, but it's often more straightforward: image size, preload hints, server response time, and render-blocking resources are addressable with clear technical steps. CLS is typically the fastest to fix once you identify the sources, as dimension attributes, font loading strategies, and reserved ad slots have well-understood solutions.
The Essentials tier delivers a detailed audit and prioritized plan with developer-ready instructions — optimized for teams who have development resources to action the work. The Standard tier includes hands-on implementation of quick-win fixes that don't require CMS code changes: image optimization, lazy loading setup, script loading attribute adjustments, and caching configuration. The Advanced tier goes further with full image re-compression, CDN configuration, and deeper JavaScript remediation. For fixes that require CMS theme changes or custom development, we provide exact specifications your developer can implement directly.
CrUX field data is collected over a rolling 28-day window, so improvements don't appear in Search Console immediately — the data reflects the last 28 days of real user visits. After fixes are deployed, lab metrics (PageSpeed Insights, Lighthouse) will show improvement right away, confirming the technical changes worked. Field data in Search Console typically begins reflecting the improvements within 2–4 weeks, with a full month of "Good" data showing within 4–6 weeks of deployment. We provide monitoring guidance so your team knows exactly what to watch for and when to expect the field data to catch up.
Book a free 30-minute partner strategy call. We'll walk through your client roster, identify which services fit, and confirm pricing. No obligation.