Basic routing in Next.js

// app/page.tsx - Home route (/)
export default function HomePage() {
  return <h1>Home Page</h1>
}

// app/about/page.tsx - About route (/about)
export default function AboutPage() {
  return <h1>About Page</h1>
}

// app/(marketing)/contact/page.tsx - Route group
// URL is /contact (marketing is ignored)
export default function ContactPage() {
  return <h1>Contact Page</h1>
}