VirtualBox allows users to easily test other operating systems on their hardware. It was created based on user input to enable testing abilities. The document recommends understanding your hardware and the operating system you will use before installing VirtualBox. Typical uses include testing potential OS upgrades and learning new virtualization techniques. Ubuntu is a free, open source operating system that is easy to install and includes office software and security benefits from its open development. It has a similar look and feel to paid operating systems like Windows.