Quick answers

What is a good page load time for an ecommerce site?

Under 2.5 seconds LCP on mobile field data is the passing bar; under 2 seconds is where leading stores sit. Field (real-user) data matters more than lab scores.

Do third-party scripts really slow down ecommerce sites?

Yes - tags, pixels, and widgets are the most common cause of slow storefronts, often consuming more main-thread time than the platform itself.

How much does site speed affect conversion rate?

Measurably, and most steeply in the first few seconds - but the exact figure is store-specific. Bucket your own sessions by load time and compare conversion rates instead of quoting industry stats.

What is the difference between LCP and INP?

LCP measures when the biggest visible element finishes rendering (loading). INP measures how fast the page responds when someone taps or clicks (responsiveness). A store can pass one and fail the other.

Can you make a Shopify store faster without changing platforms?

Yes. The big wins are in theme weight, apps, images, and third-party scripts - not the platform. Edge caching layers can also serve cached full pages in front of Shopify.