Next.js is a React framework for building production web applications with features such as file-based routing, server rendering, static generation, data fetching, API endpoints, and image optimization. It supports different rendering strategies so developers can choose an approach based on application requirements. Next.js is commonly used for ecommerce websites, SaaS platforms, marketing sites, dashboards, and content-driven applications. It also provides conventions for project structure and deployment, making it suitable for teams that want React with more built-in application features.
For projects using Next.js, teams should consider the application's requirements, expected scale, integration points, deployment environment, testing approach, and long-term maintenance. Choosing the technology should also take into account the existing skills of the development team and the libraries or services already used by the product.