Website Speed and Core Web Vitals: Why They Matter

Visitors expect pages to load quickly and respond immediately. Slow sites lose visitors and conversions, and speed is one of the signals search engines consider. Core Web Vitals are a set of measurements that describe this experience.

The Core Web Vitals

• Largest Contentful Paint (LCP): how quickly the main content appears.
• Interaction to Next Paint (INP): how quickly the page responds when someone clicks or taps.
• Cumulative Layout Shift (CLS): how much the layout jumps around while loading.

Together, they reflect whether a page feels fast, responsive, and stable.

Why speed matters

• Visitors are more likely to stay and convert on fast pages.
• Mobile users on slower connections are especially affected.
• Page experience is one of many factors search engines consider.

Common causes of slow sites

• Large, uncompressed images
• Too much JavaScript
• Slow servers or no caching
• Fonts and third-party scripts that block rendering
• Layouts without reserved space for images and ads

Fixes that make a difference

• Serve modern image formats at the right size.
• Load below-the-fold images lazily.
• Reduce and split JavaScript.
• Use caching and a content delivery network.
• Pre-render pages where possible.
• Reserve space for images and dynamic content.

Measure with real users

Lab tests are useful, but real-user data shows what visitors actually experience across devices and networks. Monitor both.

Every second of waiting is a chance for a visitor to leave.

MOKRIN builds web applications that are fast by default, using modern rendering, optimised assets, and continuous performance monitoring.