Happy Home Network
From Nookipedia, the Animal Crossing wiki
The Happy Home Network is an online play feature in Animal Crossing: Happy Home Designer since the updated version 2.0. It can be accessed through the red computer at Nook's Homes. It is used to share and visit other players' houses, as well as participate in design contests. It is available after completing the second facility.
The player can score players houses by using the ratings 'Cute', 'Cool', 'Unique', or 'I'd live here'! The player can give a rating for each of them from 0-3.
