Did you ever hear about a launcher? The launcher is what modifies and transforms your Android usage experience including how your home screen and apps browser page looks as well as the ability to manage and organize your apps in folders. Support for gestures and what not.

At times, the default Samsung launcher hogs memory and puts pressure on the battery.

To avoid this, many lightweight and feature-rich launchers like Nova are available which are dynamically optimized to consume less RAM, minimal processing power, and have a less impact on the battery.