The fixes that actually move LCP, INP, and CLS - in priority order.
Core Web Vitals affect both rankings and conversions. Work through this list in order...
- Serve images in modern formats and correct sizes
- Preload the largest contentful element
- Defer non-critical JavaScript
- Reserve space for images and embeds to avoid layout shift
- Use a CDN and sensible caching
- Audit third-party scripts ruthlessly
Most sites can reach 'good' on all three metrics within a week of focused work.