You have most likely already customized your Mac’s Dock with applications you use daily. However, if you feel that your Dock is cluttered and takes a lot of space, you can customize it from System Preferences to decrease its size. Alternatively, you can even set your Mac’s Dock only to show open, running apps!
Getting your Mac Dock to show only running apps will significantly tidy it up. And whenever you restart your Mac, you will be greeted with a tiny Dock that just has the Finder and Trash icons.