In 2025, site speed isn't just a nice-to-have—it's a critical factor that directly impacts your bottom line. Google's Core Web Vitals have become a significant ranking factor, and users expect pages to load in under 3 seconds.
Studies show that a 1-second delay in page load time can result in a 7% reduction in conversions. For an ecommerce store doing €100,000 per month, that's €7,000 in lost revenue every month—or €84,000 per year.
The three Core Web Vitals you need to optimize are: Largest Contentful Paint (LCP), which measures loading performance; First Input Delay (FID), which measures interactivity; and Cumulative Layout Shift (CLS), which measures visual stability.
Here's what you can do today: Optimize your images with modern formats like WebP, implement lazy loading, minimize render-blocking JavaScript, and leverage browser caching. These quick wins can dramatically improve your performance scores.
At Zinzo, we've helped dozens of ecommerce stores achieve 80+ performance scores, resulting in measurable conversion improvements. Our performance sprint typically delivers results within 2 weeks.