The document discusses PayPal's adoption of Node.js for their web applications. It describes identifying customer needs like unifying teams around JavaScript, conducting a pilot project building an account overview app in both Java and Node.js, and showing that the Node.js version was built faster, with fewer lines of code, and could handle more requests. While adoption was not always smooth, with challenges around mindsets and frameworks, the pilot was successful and more apps are now being built on Node.js at PayPal.