Dual Boot is a configuration that allows a single computer or device to have two separate operating systems installed, enabling the user to choose which OS to boot into at startup. This setup is commonly used for various purposes, such as testing different operating systems, running applications that are only compatible with a specific OS, or using both a personal and a work environment on the same machine.
A common dual boot setup is installing Windows alongside Ubuntu (a popular Linux distribution). Users can boot into Windows for gaming or productivity software and switch to Ubuntu for programming or open-source applications.