1. React Component is the “default export”
  2. *** Use Webpack’s hot module replacement -> Support default
  3. Navigate between Pages
    • Not use
    • Use  from ‘next/link’ -> use client-side navigation -> not send request to server 
  4. ‘/pages’, ‘/static’ –> special  folder -> not change name
  5. Layout : 3 ways
    1. Render child component
    2. Layout as a higher component
    3. Page content as prop
  6. Component: use as Header / Layout

… for styling / page layout, … 

…can import components from NPM modules and use them.