Next.js is a open-source React framework built by Vercel that enables developers

By combining the component-based approach of React with powerful backend capabilities, Next.js streamlines the development process and optimizes performance right out of the box. ​Key Features & Capabilities ​Server-Side Rendering (SSR): Generates HTML on the server for each request, ensuring faster initial page loads and superior Search Engine Optimization (SEO). ​Static Site Generation (SSG): Pre-renders pages at build time for high-speed performance and efficient caching via Content Delivery Networks (CDNs). ​App Router: Uses a file-system-based router built on React Server Components, making routing, layout nesting, and loading states intuitive. ​API Routes & Server Actions: Allows developers to write backend code and handle database queries or API requests directly within the project without needing a separate backend server. ​Built-In Optimizations: Automates image optimization (<Image/>), custom font loading, script loading, and CSS bundling to maximize performance and improve Core Web Vitals. ​Client and Server Components: Delivers interactive user experiences while keeping heavy dependencies on the server to minimize JavaScript payload sizes. ​Why It Is Popular ​Next.js simplifies web development by handling complex configurations like routing, bundling, and code splitting automatically. It is widely used by companies such as Netflix, TikTok, Twitch, and Nike for production applications ranging from e-commerce platforms and marketing sites to large-scale web apps.