The document discusses how to prepare portable bootable devices such as USB installers. It lists three learning objectives: 1) discussing different methods for creating portable bootable devices, 2) performing the steps to create a USB installer, and 3) recognizing the importance of USB installers and portable bootable devices. The document provides information on how to create a bootable Windows 10 USB drive and how to create a Windows 10 UEFI boot media using the Media Creation Tool.