Server-Side Rendering in Next.js: How It Works & When to Use It

Server-Side Rendering (SSR) in Next.js 15 leverages React 18's streaming and concurrent features to enhance performance by building webpages on the server, resulting in faster Time-to-First-Byte (TTFB) and improved user experience, particularly for dynamic content and data-heavy pages. SSR provides SEO benefits as it delivers fully populated HTML to search engines and improves Core Web Vitals, making content visible to users almost immediately. Next.js 15 supports a hybrid approach, allowing the use of SSR, Client-Side Rendering (CSR), and Static Site Generation (SSG) within the same project, optimizing rendering strategies for different pages. Using Strapi v5, developers can manage dynamic content efficiently and integrate it with Next.js to deliver high-performance applications. Though SSR is beneficial for real-time updates and personalized content, it requires careful consideration of caching strategies and error handling to avoid pitfalls like blocking the event loop or hydration mismatches. The flexibility offered by Next.js allows developers to implement SSR where it adds value, such as for SEO-focused pages or rapidly changing content, while using other rendering methods where appropriate.