Computer Help and Support

The virtual desktops feature isn't a virtual machine, it just let's you pretend you have multiple monitors hooked up to your computer, but only shows one at a time on your actual monitor. It's a way of running programs in their own desktop and you switch among the desktops. It doesn't help if you need to have both programs open on the same desktop, but it is a way to organize & group programs that you use together. For example, say you're a web designer, you could put your HTML editor and web browser in desktop #1, put your e-mail program, Twitter, and Facebook apps on desktop #2, etc. That way you don't have tons of windows from all those programs all on one desktop piled on top of each other.

I don't use virtual desktops myself, since I do most of my work on macOS & just use its ability to hide an application & all its windows, I just hide any apps I'm not using at the moment. Works for me, since I don't switch apps very frequently.

Nothing beats multiple actual monitors though.