About Wallpapers
From the developer's description on Google Play.
Make the most of your display with beautiful wallpapers and advanced features. Choose one of your own photos, an image from the Google Earth collection, a scenic landscape from Google+, and more. Change it as often as you like, so your phone always represents your style.
• Enjoy a collection that keeps on growing. Access images from Google Earth, Google+, and other partners. • Double your fun. Show the world one wallpaper on your lock screen, and keep one for yourself on your home screen. (Requires Android™ 7.0, Nougat, and above.) • Start each day fresh. Pick your favorite category and you’ll get a new wallpaper image each day.
Permissions Notice Photos/Media/Files: Needed to allow you to use custom photos as wallpaper. Storage: Needed to display the currently set wallpaper and to allow you to use custom photos as wallpaper.