You spent months building your Shopify store. You've got great products, solid branding, and you're running ads. But something isn't adding up — traffic is coming in, but sales aren't following.
The culprit is often invisible: page speed. And it's costing you more than you think.
LCP — Largest Contentful Paint — measures how long it takes for the biggest element on your page to load. That's usually your hero image or headline. Google uses LCP as a direct ranking signal. A slow LCP means lower rankings and fewer organic visitors.
Most Shopify stores we scan have an LCP between 4 and 10 seconds on mobile. The target is under 2.5 seconds. Every second above that is customers leaving before they even see your products.
Too many apps. Every Shopify app you install adds JavaScript to your store. Most store owners install 15-30 apps over time. Each one slows your page a little. Together they can add 3-5 seconds to your load time.
Unoptimised images. A product image straight from a camera can be 4-8MB. Shopify compresses them somewhat, but many stores still serve images that are 10x larger than they need to be.
Render-blocking scripts. Some apps load their JavaScript before your page content — blocking the browser from showing anything until the script finishes. This inflates your TBT (Total Blocking Time) score and makes your store feel sluggish even on fast connections.
Slow themes. Not all Shopify themes are built equally. Some premium themes are bloated with animations and features that look great in demos but destroy performance in production.
Google's PageSpeed Insights gives you a free speed score for any URL. Enter your homepage and look at three numbers: your Mobile Score, your LCP, and your TBT.
Mobile Score under 50 is poor. LCP over 4 seconds is slow. TBT over 600ms means your JavaScript is blocking rendering.
If any of those are in the red — you have work to do.
Start with images. Run your product images through a compression tool and re-upload them. This alone can cut 1-2 seconds from your load time with no technical knowledge required.
Then audit your apps. Go to your Shopify admin and look at every installed app. If you haven't used it in 30 days — uninstall it. Each removal makes your store faster.
Finally, check your theme settings. Most themes have options to disable animations, lazy-load images, and defer non-critical scripts. These settings are often buried in theme customization but they make a significant difference.
Cartfy scans your Shopify store and gives you a plain-English breakdown of exactly what's slowing you down — and what to fix first.
Get your free store health report →