What Core Web Vitals Actually Cost You in Lost Leads

Owners treat site speed as a technical detail. It is a revenue line item, and the math is straightforward enough to do on a napkin.

The Three Metrics That Matter

Largest Contentful Paint measures how fast the main content appears — target under 2.5 seconds. Interaction to Next Paint measures responsiveness — target under 200 milliseconds. Cumulative Layout Shift measures visual stability — target under 0.1.

The Conversion Arithmetic

Take a site with 2,000 monthly visitors converting at three percent. That is 60 leads. Industry data consistently shows meaningful conversion loss per additional second of load time. Cutting three seconds off a slow mobile experience routinely returns a double-digit percentage lift in form fills — real jobs, every month, from a technical fix.

Mobile Is Where the Damage Happens

Most local service traffic is mobile, often on cellular. A site that scores well on a desktop test can be painfully slow on a phone in a driveway. Always test on throttled mobile.

The Usual Culprits

Uncompressed hero images, render-blocking third-party scripts, unoptimized fonts, and heavy page builders account for the overwhelming majority of failures we find.

Layout Shift Kills Trust

A button that moves as the page settles causes mis-taps and abandonment. Reserving explicit width and height on images and ad slots eliminates most of it.

Next Step

Our free visibility snapshot includes a live Core Web Vitals scan against 2026 benchmarks, with the specific assets causing your delays.