Similar to TeamViewer a remote desktop connection enables remote access to another computer. This has the advantage that you don’t need two monitors or have to switch between two systems.
Although the Raspberry Pi can be controlled almost exclusively via console, but some programs are to be controlled only by a GUI. On all Windows systems a program for remote access is already installed and therefore it requires no additional software. And even on Mac OS or other Linux distributions it is very easy to connect to the Pi.