The Start screen that appears by default is not necessarily the Start screen that's best for you. There are many ways to customize it, though. Here I'll show you how to add, remove, rearrange and otherwise tweak the tiles on your screen.
To remove a tile from the Start screen, right-click it and select "Unpin from Start" from the bar that appears at the bottom of the screen. You can select multiple apps by holding down the Ctrl key as you right-click them, and then unpin them in one fell swoop.
If you don't want a live tile such as the Weather app to display changing information, right-click it and select "Turn live tile off." To make a large tile smaller or a small tile larger, right-click it and select "Smaller" or "Larger."
Adding tiles to the Start screen takes a little more work than unpinning them, but not a lot. If you're on the Start screen and you know the name of the app you want to add, type its name. You'll be sent to the Search charm, and the app will show up on the left. Right-click it, and from the bar that appears at the bottom of the screen, select "Pin to Start." If you search for a Desktop app and right-click it, you'll also be able to pin it to the Desktop taskbar. If it's already pinned to the taskbar, you can unpin it.