If you do quite a bit of online research while working on your Mac, chances are you have a ton of windows and apps open. Finding the main application that you are working on in that mess can be annoying. Use this keyboard shortcut to hide all open windows except the active one on Mac.
Sometimes, with so many open applications and windows on your Mac, you may have difficulty in focusing your attention on the active application you are using. But closing all open windows is not an option. In such a case, you can use this incredibly useful shortcut to quickly dismiss unused background apps. This will hide inactive windows, so you can easily get back to any of them again if need be.