Virtualization enables you to use several operating systems on your computer hardware at the same time.
On a Mac, virtualization uses a hypervisor (a software layer), for emulating the underlying hardware. Because of this, a guest operating system that runs on a virtual machine runs noticeably slower than in Boot Camp. But unlike Boot Camp, you can run the Mac OS and the guest OS both at the same time.
For Mac, there are 3 primary virtualization apps: Parallels, VMWare Fusion, and VirtualBox.
Downloading and running windows on your Apple Macbook is easier than ever. Boot Camp is a utility that comes pre installed on your Macbook that allows you to switch between Microsoft Windows programing and MacOS. All you have to do is download windows onto your computer from online, and then let the Boot Camp utility on you laptop walk you through the steps of installing Windows.