Out of the box, Shopify Dawn is lightweight, but after adding Google Tag Manager, Klaviyo, and product carousels, mobile PageSpeed drops below 50. Here are the 3 biggest wins:
Add preload="true" and fetchpriority="high" to your first section image tag inside image-banner.liquid.
Ensure global.js is loaded with defer="defer" to prevent render-blocking on mobile devices.
Get your store optimized for mobile speed under 1.5s with zero visual design regressions.
Bilal (Goofy Developer) builds custom Shopify stores, GoHighLevel automation pipelines, and Meta ad campaigns focused on more sales.