How to fix cwv lcp on Shopify Plus

Steps for Shopify Plus

1. Follow all standard Shopify steps above — Shopify Plus uses the same Liquid/theme architecture.
2. Additionally, use Shopify Plus's Script Editor (or Shopify Functions) to review checkout scripts — remove or defer any non-critical checkout JS that may be loaded site-wide via theme.liquid.
3. Use the Shopify Plus Organization Admin to push the optimized theme across multiple stores simultaneously if the same hero template is used across storefronts.
4. Engage Shopify Plus's Launch Engineer or a Shopify Expert for server-side rendering (Hydrogen/Oxygen) migration if LCP cannot be brought under 2.5s through theme-level changes alone.

<link rel="preload" as="image" href="/images/hero-banner.webp" fetchpriority="high" imagesrcset="/images/hero-banner-800.webp 800w, /images/hero-banner-1500.webp 1500w" imagesizes="100vw">

<!-- Hero img tag — NO lazy loading, explicit dimensions -->
<img src="/images/hero-banner.webp"
     srcset="/images/hero-banner-800.webp 800w, /images/hero-banner-1500.webp 1500w"
     sizes="100vw"
     width="1500" height="600"
     alt="Descriptive hero text"
     fetchpriority="high"
     loading="eager">

What is cwv lcp?

Largest Contentful Paint (LCP) measures how long it takes for the biggest visible element on your page — almost always the hero image or headline banner — to fully appear on the screen after someone clicks your link. Google considers anything under 2.5 seconds "Good," 2.5–4 seconds "Needs Improvement," and over 4 seconds "Poor." An LCP of 7.5 seconds on mobile means shoppers are staring at a blank or half-loaded page for over seven seconds before they see your store's main content — a painfully long wait that drives them away before they ever see your products.

LCP is one of Google's Core Web Vitals, a confirmed ranking signal that directly affects where your store appears in search results. A poor LCP score suppresses organic traffic, meaning fewer potential buyers even find your store. On mobile — where most ecommerce browsing now happens — slow LCP dramatically increases bounce rates: studies consistently show conversions drop 4–8% for every additional second of load time. Improving LCP from 7.5s to under 2.5s can meaningfully lift both your search rankings and the percentage of visitors who stay long enough to make a purchase. Mobile-first indexing means Google judges your site primarily by its mobile experience, so a slow mobile LCP hurts your desktop rankings too.

See the complete Cwv lcp guide for every platform and the full background.