To create a folder:
Touch and hold an app icon until they all start to jiggle, then drag the app icon over another icon and release.

1  iPad will create a new folder with both apps in it, and shows the folder’s name. The folder will be named according to the category of the apps it contains, but you can rename it as you like.

2    Double tap the folder to open it and see its contents.

3    Just  tap the name field to enter a different name.