Server-side rendering (SSR) is a web development technique where HTML content for web pages is generated on the server before being sent to the client's browser. This approach contrasts with client-side rendering, where JavaScript dynamically renders the page in the browser after loading the raw data. SSR offers several benefits, including faster initial loads, improved SEO, and enhanced performance, especially for content-heavy websites and applications that require fast, frequent UI updates. However, it also introduces additional complexity, such as managing server load and performance, navigating state management challenges, and minimizing payload size. By understanding when to use SSR, developers can build applications that deliver speed, accessibility, and performance without compromising flexibility or maintainability. Modern tools like Next.js and headless CMS platforms like Strapi v5 simplify the implementation process and provide powerful content management with seamless integration into rendering workflows.