You found the glovebox.

Putting it on your phone

Tap Download. If the picture just opens instead, press and hold it, then save it.

iPhone

1. Press and hold the picture, then tap Save to Photos.
2. Open Photos and find it.
3. Tap the share button, then Use as Wallpaper.
4. Line it up, tap Add, then choose lock screen, home screen, or both.

Android

1. Tap Download. It goes to your Downloads or Gallery.
2. Open it in Photos or Gallery.
3. Tap the three dots, then Set as wallpaper.
4. Pick home screen, lock screen, or both.

Menus differ a little by phone. Long way round: Settings, then Wallpaper.