This is a great feature that can easily be accessed at any time by pressing F4 on your keyboard.

Households (and single Sims), Houses, Lots, and Rooms may be downloaded and added to your library where you can then place or use them in your game. The Sims 4 Gallery brilliantly integrates with Sims 4 and allows players to browse and download free content created by fellow Simmers. The Sims 4 Gallery Guide How To's, Using the Gallery for Sims and Homes The Sims 4 Gallery lets you Download and share Sims, Homes, Lots, and Rooms with the Sims Community