If you need to run your Raspberry Pi “headless” (without a monitor) you can connect to it via SSH. But if you need access to the desktop then one option is to use VNC, which is great if you aren’t already using Microsoft’s Remote Desktop Protocol (RDP) to connect with other servers. But if you are already using RDP then it is more convenient to enable RDP access to the Raspberry Pi and stick with just one type of client viewer.

RDP is a proprietary protocol developed by Microsoft. It is used primarily in Microsoft’s Windows Server products so that the servers can run without a monitor attached. All modern desktop versions of Windows (like Windows Vista, Windows 7 and Windows 8) all come with an RDP viewer (called Remote Desktop Connection) pre-installed. This means you won’t need to install any extra software to access the Pi’s full desktop from a Windows PC.

Full article here:
Enabling Remote Desktop Access with xdrp on a Raspberry Pi (Make Tech Easier)