CORE WEB VITALS

Developers optimize blindly.
We measure first.

Q: How do you measure results?

With real-time dashboards, monthly reports and clear KPIs defined at the start of the project.

Q: How much does the service cost?

Each project is different. After a free initial consultation, we present a customized quote with no obligation.

Q: How long until we see results?

Depends on the service. SEO: 3-6 months. Paid: results from the first week. Content: progressive impact.

Q: Do you work with international companies?

Yes, we work in 11+ languages with native teams. We have offices in Barcelona and Herdecke (Germany). Most of our clients are international.

Q: What makes you different from other agencies?

We build our own tools (AI Visibility Tracker, ETIM Classifier). We combine proprietary technology with 20+ years of B2B digital marketing experience.

Google-certified in Core Web Vitals with 100+ optimized projects.

Free CWV Audit

Trusted by leading brands

20+

Years of experience

300+

Projects managed

Working languages

97%

Returning clients

The Problem

Why your PageSpeed is not improving

Measure wrong = optimize wrong

PageSpeed Insights shows lab data. Field data (CrUX) is what Google uses to rank.

INP replaced FID — and nobody noticed

Since March 2024, INP replaces FID. Many developers still optimize for FID.

Without historical tracking, no context

A PageSpeed snapshot tells you nothing. You need continuous tracking.

Optimizations that break other things

Aggressive lazy load affecting LCP, code splitting worsening INP.

ZDS helped us transform our digital strategy. Results exceeded our expectations in core web vitals.

Digital Marketing Manager

Cliente internacional

Our Process

From red to green in weeks

Diagnosis with real data

CWV tracking with field data (CrUX + custom RUM). Real user data.

Bottleneck identification

Waterfall analysis, JS profiling, critical rendering path.

Prioritized implementation

Quick wins first, then deep optimizations. Each change measured before and after.

Tracking dashboard

Looker Studio dashboard with historical CWV, regression alerts.

Ready?
Let's talk.

Free initial consultation. No obligation.

Request a consultation

Why Choose ZDS for Core Web Vitals

Setup Time

3-6 months

2-4 weeks

Expertise

Learning curve

20+ years experience

Tools

Additional costs

Proprietary stack included

Languages

1-2 languages

11+ native languages

Results

Uncertain

Guaranteed KPIs

Glossary

FAQ

Frequently asked questions

How do you measure results?

How much does the service cost?

How long until we see results?

Do you work with international companies?

What makes you different from other agencies?

Stalled traffic? Let's talk SEO.

We look at your website and tell you exactly what to do to grow in Google. No strings attached.

Manuel Riveiro

Director — SEO & Technical Consulting

Developers optimize blindly. We measure first.