Multiple Desktops are great for organizing your apps and decluttering your taskbar. Try one desktop for Outlook, one for deep work on a project, and one for, um, research!
Here are the keyboard shortcuts used in this video:
Ctrl+Win+D = New Desktop
Ctrl+Win+Left Arrow = Previous Desktop
Ctrl+Win+Right Arrow = Next Desktop
Ctrl+Win+F4 = Close Current Desktop
Win+Tab = Task View