What's the difference between page speed and site speed optimization?

Page speed optimization focuses on individual pages, while site speed optimization addresses performance across the entire website. Page speed work targets specific high-traffic or important pages. Site speed work involves systematic changes affecting all pages (CDN setup, caching strategies, code optimization). Most performance projects involve both—optimizing critical pages first, then implementing site-wide improvements. Site speed optimization often provides better long-term value as improvements benefit all pages. However, page-specific optimization can deliver quick wins. Good consultants balance both approaches, optimizing key pages while building site-wide performance improvements.