How to troubleshoot conversion issues when Shopify loading speed is slow

Poor conversion on an independent site is sometimes not because the product is bad, but because the page loads too slowly. Especially on mobile, if users wait three or four seconds after clicking an ad, they have already swiped away. You might see traffic in the backend, but in reality, many people haven't even looked at the first screen properly. When troubleshooting Shopify speed, I usually…