Core Web Vitals (CWVs) measure user experience using three key metrics: Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS). Optimizing CWVs is essential because these metrics directly affect user experience and search rankings. By improving server response times, minimizing render-blocking resources, optimizing images, prioritizing critical resources, breaking up long JavaScript tasks, reducing JavaScript bundle size, deferring or removing third-party scripts, optimizing event handlers, using Web Workers for heavy processing, setting image dimensions to prevent shifts, reserving space for injected content, and using font loading strategies that avoid shifts, developers can improve CWVs. Strapi v5 supports better performance across LCP, INP, and CLS by providing a decoupled architecture, full control over asset delivery, seamless integration with frameworks like Next.js, developer-focused performance tooling, and proven performance in real-world setups.