Combining it with Cmd lets you toggle between app windows, which is helpful if you’ve got three browser sessions going at once, and 12 PDFs open in Preview.
This character is called a grave accent, and unless you write in a language that uses it frequently (like Italian), you probably don’t know it’s right above the Tab key. You can use it to launch apps, define words, do math and unit conversions, check the weather, find files and folders in your device, and more. Opens the Spotlight feature to search for things locally and online. You can use a paper one and have it somewhere around your work station, or you can use Apple’s Stickies app to create a digital one and keep it on your desktop at all times. Some of these you may already know, but writing the ones you don’t on a handy sticky note to use as a cheat sheet is a great idea. If you put words together on macOS, these 38 keyboard shortcuts will help you forget your mouse or trackpad, and transform you into a badass Mac super-user. Keeping your hands properly positioned on your keyboard increases your speed and accuracy, giving an immediate boost to your productivity.
If you want to improve your typing, you should be touching your mouse as infrequently as possible.