Where to start with e-commerce performance.

Start with real-user data and combine it with lab measurements. Examine LCP, INP and CLS separately for important page types.

Templates

Product and listing pages can have different bottlenecks from account or checkout journeys.

Loading strategy

Review images, critical CSS, JavaScript budgets, lazy loading and third-party scripts.

Ongoing measurement

A measurement plan helps separate visible score changes from improvements customers experience. Include performance in the development cycle.