Website speed optimization covers the full set of changes that make a page load and become usable faster: image compression and resizing, minimizing render-blocking CSS and JavaScript, browser and server caching, using a CDN, and choosing hosting that can actually keep up with a site's traffic.
The stakes on both sides are well documented. On the user side, a meaningful share of visitors abandon a page that takes more than a few seconds to load, and that abandonment rate climbs sharply the slower a page gets; a slow page loses real visitors before they ever see the content it was built to deliver. On the ranking side, Core Web Vitals made speed and loading experience a direct, measurable part of Google's ranking systems rather than just an indirect influence on user behavior. Because so many individual factors feed into overall speed, effective optimization usually starts with a tool like PageSpeed Insights or Lighthouse to identify what's actually slowing a specific page down, rather than applying every possible speed technique blindly to a page whose real bottleneck might be just one or two specific issues.
