Installing Manjaro inside a VirtualBox virtual machine is a great way to give the operating system a test run or to install some Linux software that you don't want to run on your main system. If you're a Windows user, this is also a convenient way to stick a toe in the water with Linux, with the other option being to dual boot Windows 10 and Manjaro.
This is a companion discussion topic for the original entry at https://linuxconfig.org/install-manjaro-in-virtualbox