Core Web Vitals

Dark data visualization with a page load time speedometer next to a declining conversion rate line graph, an ecommerce checkout button, and a milliseconds counter

Shopify Just Tied Every 100ms of LCP to a 3.5% Conversion Drop

Shopify published 28 days of conversion data on April 27, 2026 showing that every 100 milliseconds of slower Largest Contentful Paint costs roughly 3.5% in conversion across actively-selling stores. Stores hitting a 2.5-second LCP convert about 30% lower than stores at 1.5 seconds. Cumulative Layout Shift, the

Technical blueprint showing web page weight scale tipping as structured data code blocks stack up against mobile loading speed

Web Pages Tripled in Size Since 2015. Google Noticed. They Are Also Part of the Problem.

Web pages have tripled in size over the last decade. The median mobile homepage weighed 845 KB in 2015. By mid-2025, the HTTP Archive Web Almanac measured that number at 2,362 KB. Nearly three times heavier, and the trend shows no sign of flattening. Google knows this. On a