Slow Shopify product page on mobile? Check your hero image first. A common mistake: lazy-loading the first product image. Lazy loading is for images below the fold. The main image should load right away, and adding fetchpriority="high" to it tells the browser to grab it first. On the stores we audit, fixing just this often moves LCP more than removing a whole app. Test it in PageSpeed Insights before and after, so you see the real number.