What is a good Lighthouse score?

A score of 90+ is considered good, but for maximum impact on SEO and user experience, you should aim for 95-100. The final 10% can provide significant gains in lower advertising costs and higher conversion rates.

Why are Core Web Vitals important for SEO?

Google uses Core Web Vitals as a ranking signal. Websites that pass all three metrics (LCP, CLS, INP) gain better visibility in search results. Additionally, poor performance negatively impacts user experience, leading to higher bounce rates.

What does poor performance cost in Google Ads?

Landing page quality accounts for approximately 39% of Quality Score in Google Ads. A slow-loading website can experience up to 400% higher CPC costs and worse ad placement compared to faster competitors.

Is WCAG accessibility legally required?

In the EU and EEA, the European Accessibility Act requires WCAG 2.1 AA compliance for most digital services from 2025. Non-compliance can result in significant fines. Good accessibility also improves user experience for everyone.

How long does it take to improve performance?

Depending on website complexity, basic optimizations can be done in 1-2 weeks. For comprehensive improvements requiring code rewrites or infrastructure changes, expect 4-8 weeks.

Case Studies

From 90 to 100.
The Quest for Perfect Score.

What the final 10% means for your business

18 min readSeptember 20, 2025

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From 90 to 100.The Quest for Perfect Score.

Time to build something proper?

From 90 to 100.
The Quest for Perfect Score.