You see the home screen when you turn on and unlock your phone.
Swipe right or left to move between home screens.

up from the bottom of the screen to see the list of all your apps.
navigation icons instead. Learn how.You can add more home screens to the right. To add a page, drag an app shortcut or widget to the edge of an existing page and place it on the new screen.
To remove a home screen, drag all apps, shortcuts, widgets, and folders off the screen. After you remove the last item, the home screen will be removed.
Organize it:
Change how you get around: You can replace the navigation bar with the
navigation icons.
Change how it looks: