This is a Next.js project bootstrapped with create-next-app.
Next.js uses file based routing
app/page or app/about/page - Page is the name for root component that will load when visiting a route e.g app/page is the Homepage (/), app/about/page is when the user visits /about.
Nested routing is handling the same way e.g app/about/team/page would map to /about/team
Next.js layouts apply across a set of routes, e.g the root app/layout applies to every page of your app. You can also have layouts peer route e.g about/layout.tsx would apply to all about pages / routes (aka about/team).
Metadata - Meta can be exported from any route by setting export const metadata = ..., this means each route can have their own page title.
All components in Next.js 13 are server components by default, you have to opt-into client components.