Spotlight also works great as a quick app launcher, both on macOS and iOS. Since Spotlight prioritizes app names in search results, you can often pull up an app and launch it simply by typing a few letters.
For example, press CMD+SPACEBAR and type “saf” and press enter and Safari will open up, or if it’s already open, it will simply switch to being the active app. It’s a much faster way to launch an app, especially if your fingers are already on the keyboard anyway.
This works great on iOS too, especially if you have a lot of apps and they’re buried in folders. Forget which folder an app is in? Not only can you launch it from Spotlight, but the search results will identify the folder name for you, so you’ll know where to look for it next time.