In this tutorial you will learn how to install Kali Linux on Virtual Box.
You can also install Kali Linux by replacing the existing operating system, but using it via a virtual machine would be a better and safer option.
With Virtual Box, you can use Kali Linux as a regular application in your Windows/Linux system. It’s almost the same as running an application or game in your system.
Using Kali Linux in a virtual machine is safe. Whatever you do inside Kali Linux will not impact your host system. Your actual operating system will not be affected and your data in the host system will be safe.