Core Web Vitals Fix

Measure, fix, then prove it moved

Core Web Vitals are three measurements of how a page feels to use. Largest Contentful Paint asks how long before the main content appears. Cumulative Layout Shift asks whether things jump around while loading, which is what makes people tap the wrong link. Interaction to Next Paint measures how quickly the page responds after someone interacts with it. Google reports these metrics using real-user data as well as lab testing, which is why a site can score well in a synthetic tool and still perform poorly for actual visitors.

The engagement starts with profiling. We work from your field data where it is available and from traced page loads where it is not, and identify the specific causes rather than the symptoms: render-blocking resources, unsized images, fonts loading late and reflowing the text, third-party scripts blocking the main thread, and layout shifts caused by advertising or consent banners injected after paint.

You then get a fix plan, prioritised by the likely improvement against the effort required to implement it. We carry out the agreed work, including image handling and lazy loading where appropriate, and check accessibility alongside it, since focus order, contrast and tap-target size are part of usable mobile pages and are often efficient to correct while the templates are already open. Finally, we re-measure and hand over a before-and-after report so the improvement is documented rather than simply asserted.

The performance half of Technical SEO: the one-time diagnosis and fix for the LCP, CLS and INP issues that sit underneath otherwise well-written pages.