Introduction/Guides/MigratingMigratingApp RouterLearn how to upgrade your existing Next.js application from the Pages Router to the App Router.Create React AppLearn how to migrate your existing React application from Create React App to Next.js.ViteLearn how to migrate your existing React application from Vite to Next.js.VideosRecommendations and best practices for optimizing videos in your Next.js application.App RouterLearn how to upgrade your existing Next.js application from the Pages Router to the App Router.