137. What Is "File-based Routing"? And Why Is It Helpful?

/pages

• index.js - Main starting page → my-domain.com/
• about.js - About page → my-domain.com/about
• /products
  • index.js - All products page → my-domain.com/products
  • [id].js - Product detail page → my-domain.com/products/1

138-140. Adding pages with Nested Paths & Routes