Years ago installing a custom launcher was almost mandatory. They improved notably the performance and agility of the desktop and the drawer of applications in addition to putting many customization options. Today its usefulness is more for the second: offer a lot of functions to put to our liking the main screen of our Android.
This category of apps has had a long journey: new competitors have appeared, others have fallen by the wayside and a few have remained active for many years. If you are looking for a good launcher, right now these are the best options for Android.