The video resolution in the guest will be automatically adjusted, as if you had manually entered an arbitrary resolution in the guest’s Display settings. It also allows you to resize the virtual machine’s window.

Better video support: The custom video drivers that are installed with the Guest Additions provide you with extra high and non-standard video modes, as well as accelerated video performance.

You can tell VirtualBox to treat a certain host directory as a shared folder, and the program will make it available to the guest operating system as a network share, irrespective of whether guest actually has a network.

Shared folders: My favorite feature this feature allows you to exchange files between the host and the guest.

Drag and drop: You can also drag and drop files between the host and the guest OS.

Shared clipboard: With the Guest Additions installed, you can copy-paste between the guest and the host operating systems.

Mouse pointer integration: You no longer need to press any key to “free” the cursor from the Guest OS.

Install guest additions virtualbox