The webshop checklist
Speed and mobile checklist for your webshop
Your store passes this part of the audit when it meets Google's three Core Web Vitals on mobile (LCP under 2.5 seconds, INP under 200 milliseconds and CLS under 0.1), serves images at the size each screen needs, loads video only when needed and runs no scripts you don't use. Google's PageSpeed Insights shows all three for free.
By the MoraLab team · Updated · 2 min read
The 6 checks
Largest Contentful Paint under 2.5 seconds
How long it takes for the main content, usually the product image, to appear. Test it: run a product page through PageSpeed Insights on mobile.
Interaction to Next Paint under 200 milliseconds
How quickly the page reacts when a shopper taps something, such as a size button. Slow responses usually come from heavy scripts.
Cumulative Layout Shift under 0.1
How much the page jumps while it loads. A buy button that moves as images appear makes shoppers tap the wrong thing.
Images at the size each screen needs
High-resolution originals, served as smaller WebP or AVIF files to phones. Most store platforms do this when images are uploaded properly. Test it: check the image file sizes in PageSpeed Insights.
Video and lower images loaded when needed
Video and images further down the page load only when the shopper gets to them. Test it: open a page and watch whether everything loads at once.
Apps and scripts you no longer use removed
Old apps, chat widgets and tracking tags slow every page. Test it: list every app and script and ask what each one earns.
Fixing what you found
Large images and too many apps cause most slow stores. Start there before you look at hosting or code. Change one thing at a time and measure again, so you know what helped.
Frequently asked questions
What is a good speed for a webshop?
Meeting Google's Core Web Vitals on mobile: LCP under 2.5 seconds, INP under 200 milliseconds and CLS under 0.1, measured at the 75th percentile of real visits.
Do product videos slow down my store?
Not if they load only when played or scrolled into view, with a light poster image. Large videos that start automatically at the top of the page can.