What does a strong performance optimization strategy include?

A strong performance optimization strategy begins with a Lighthouse and WebPageTest audit to establish baselines and identify the highest-impact issues before any changes are made. Optimization effort should be prioritized by the performance gains achievable relative to implementation complexity, focusing first on image optimization, script loading strategy, and caching configuration, which typically produce the largest improvements with manageable effort.

The strategy should include: converting images to WebP format with responsive srcset attributes, implementing lazy loading for below-fold assets, deferring non-critical JavaScript and loading analytics tags asynchronously through Google Tag Manager, configuring browser and server-side caching with appropriate cache-control headers, serving the site through a CDN like Cloudflare to reduce latency for geographically distributed audiences, and implementing critical CSS inlining to eliminate render-blocking stylesheets for above-fold content.