02
LCP too slow (> 4s)
Your hero or largest visible image loads in over 4 seconds. Core Web Vitals flag the page as Poor, hurting rankings and conversion.
What it means
Your hero or largest visible image loads in over 4 seconds. Core Web Vitals flag the page as Poor, hurting rankings and conversion.
Why it happens on Shopify
Hero without fetchpriority="high", lazy-loaded by mistake, or heavy unresized uploads.
How to check if you have this issue
Identify the LCP element in a mobile PageSpeed Insights test. Separate lab measurements from available field data and check representative templates, image discovery, request priority and render delays.
How to fix it: precise steps
Address the observed cause: delayed main image loading, oversized files or blocking resources. Avoid lazy loading the LCP image, serve an appropriate size and retest. One lab run does not establish a lasting field improvement.
How to confirm it is fixed
Repeat the same checks as in the verification step after deploy. SEO effects can take days to weeks depending on crawl budget.
Impact on SEO and conversion
Fixing a critical issue reduces the risk of visibility or revenue loss; measure via qualified traffic and indexation stability.