Speed is one of the most talked about areas in ecommerce, but also one of the most misunderstood.
A lot of stores focus on chasing perfect scores instead of improving the actual user experience.
The goal isn’t just to make your store “fast” on paper. It’s to make it feel fast for real users, especially on mobile.
Here’s what actually matters when it comes to Shopify speed optimisation.
1. Perceived Speed vs Measured Speed
There’s a difference between how fast your store feels and what tools say.
You can have a high performance score and still feel slow, or a lower score that feels smooth and responsive.
What matters:
Focus on how quickly users can start interacting with your store, not just metrics.
2. Images Are Usually the Biggest Issue
Large, unoptimised images are one of the most common causes of slow stores.
Fix:
- Resize images to the correct dimensions
- Compress files without losing quality
- Avoid uploading unnecessarily large assets
3. Too Many Apps and Scripts
Every app you install can add scripts to your store.
Over time, this builds up and slows everything down.
This is something I see a lot in my Shopify mistakes post.
Fix:
Remove anything you don’t need and be selective with what you install.
If you’re deciding between apps and custom solutions, I break that down in this guide.
4. Theme Quality Matters More Than You Think
Not all themes are built the same.
Some are lightweight and optimised, others are bloated with unnecessary features.
Fix:
Choose a well-built theme and avoid overloading it with heavy customisations that impact performance.
5. Mobile Performance Is Everything
Most users are on mobile, so that’s where speed matters most.
A store that feels fast on desktop can still struggle on mobile.
Fix:
Test your store on real devices and prioritise mobile optimisation.
6. Third-Party Scripts Add Up
Analytics tools, tracking pixels, and external scripts can all impact performance.
Individually they might not seem like much, but together they can slow things down.
Fix:
Only keep what’s necessary and review scripts regularly.
7. Don’t Chase Perfect Scores
This is a big one.
Trying to hit 100 on performance tools often leads to unnecessary work that doesn’t actually improve conversions.
What matters:
Focus on real user experience, not just numbers.
How This Links to Conversion
Speed isn’t just about performance, it directly affects how users interact with your store.
Slow load times, laggy interactions, and delays all increase drop-off.
This ties closely into the issues I cover in why your Shopify store isn’t converting.
Final Thoughts
You don’t need a perfect score to have a fast, high-performing store.
Focus on the areas that actually impact users, images, apps, scripts, and mobile performance.
Fixing these will usually give you the biggest return.
Want Me to Review Your Store?
If you’re not sure what’s slowing your store down, feel free to get in touch.
I can quickly spot what’s worth fixing and what isn’t.
CRO
