If you tap on the trolley with boxes (lower-right corner icons), you enter the decoration shop. There you could find different furniture that will provide a specific number of little crowns, which are useful to level your avatar up. Every object will add crowns to your status counter, but those related to your career will add the double!

There are different sets of furniture apart from those related to your avatars’ careers. Explore the decoration shop and find your favorites.

To place furniture in your house, tap on the armchair icon. Slide sideways to see the whole inventory. You can’t sell objects, but you could decide to place them in a room or not. They will remain in your inventory just in case you need them one day.
 
Your furniture directly affects your avatars' level. If you remove a piece of furniture from your house, or when you move into a new house some furniture may return to the inventory, and you will need to place it again to recover your lost crowns.

If you buy wallpapers or new floors, you will find them tapping on the tabs located in the inventory dialog window. They don’t provide extra status crowns, but they give a stylish touch to your house.

All your furniture will travel with you to new houses.