The _app.js file is a custom App component that wraps all page components. It's used to:

• Keep state when navigating between pages
• Add global CSS
• Inject additional data into pages
• Handle global error boundaries
• Add common layout components

function MyApp({ Component, pageProps }) {
  return (
    <div>
      <GlobalHeader />
      <Component {...pageProps} />
      <GlobalFooter />
    </div>
  );
}

export default MyApp;