Where slowness costs money.
WHY IT MATTERS MORE FOR SHOPS
A slow homepage loses visitors. A slow checkout loses sales already won.
WHAT MAKES SHOPS SLOW
Product images, in volume Too many products per category page Cart and checkout, which cannot be cached Plugins adding queries per product Related products and cross-sells
WHAT TO PRIORITISE
The checkout path Product pages Category pages
FOR CATEGORY PAGES
Show twenty products, not a hundred.
Nobody scrolls that far and it costs loading time.
FOR IMAGES
Standardise size and compression, applied on upload.
FOR THE CHECKOUT
It cannot be cached, so everything else about it matters more.
Remove unnecessary scripts from it.
WHAT TO TEST
Complete a purchase on a phone on mobile data.
That is the experience determining your revenue.
WHAT TO CHECK AFTER ANY CHANGE
That the checkout still works and is still fast.
