Case study

Core Web Vitals in the green

From unstable metrics to a much faster, more reliable experience that is better prepared to capture organic demand.

Sector
B2B corporate
Timeline
12 weeks
Client
Confidential
Category
Corporate
Services involved

Strategy, execution and technical coordination focused on solving the problem with a clearer reading of the product, brand or demand.

PerformanceTechnical SEOFrontendObservability
Stack
Next.jsVercelTailwind
Gallery

Project overview

A consistent structure to review context, decisions and execution assets without losing clarity between different projects.

Core Web Vitals in the green · Audit comparison before and after the intervention.
01 / 03
Audit comparison before and after the intervention.
Project information

Frontend refactor plus image and font optimization for a clearer, more stable experience.

Year
2025
Impact
92
Key signals
Commercial clarityMore stable loadingSmoother experience
Problems found
01

The hero was too heavy and fonts had no loading strategy, hurting the site's first impression.

02

Layout shifts affected key above-the-fold blocks because the structure was not stable enough.

03

Unnecessary JavaScript was present on the critical path of lead-generation pages.

What we solved
01

We reordered the loading of critical assets, images, fonts and render priorities.

02

We reduced CLS and INP by correcting visual structure, hydration and frontend dependencies.

03

We implemented useful measurement so decisions were driven by data instead of only Lighthouse.

Results

Metrics and final outcome

MetricBeforeAfterChange
LCP4.6 s2.1 s-54%
CLS0.170.03-82%
INP280 ms140 ms-50%
Organic leadsBaseline+47%+47%
Business outcome
01

CWV turned green across most critical URLs within a few weeks.

02

Perceived stability improved on mobile and the commercial reading became clearer.

03

Organic form submissions increased thanks to a more solid experience.

Team

Reviews from the team involved

Notes from frontend, SEO, UX or product on what materially moved the case forward.

Frontend lead

The biggest improvement came from cleaning the critical path and giving real hierarchy back to what renders first.

Technical SEO

It was not only about speed. Fixing CWV helped us sustain visibility and conversion capacity much better.

UX/UI

Reducing visual friction helped as much as optimizing code. The perception of quality changed from the first scroll.

FAQ

Frequently asked questions about this project.

What we usually review

The most common questions are about scope, stack, whether the work can be phased and which part of the project produced the clearest impact on the experience.

ScopeStackExecution

Yes. What gets replicated is not a fixed template but the logic of diagnosis, prioritization and execution according to goals, constraints and the current state of the site or product.