The Neighborhood is a group of players that are able to interact with each other in contrast to the rest of the players of the same world. The game randomly puts all players in neighborhoods and all neighborhoods are updated every other Monday.
All players within a neighborhood are able to perform actions to each other without the requirement of either being friends or belonging to the same guild. The normal set of actions are motivating and polishing (both actions can also be performed by aiding).
Neighbors can attack each other, and if the attack succeeds, the attacking player can plunder unmotivated buildings in the attacked player's town. All neighbors can also contribute to other neighbors' great buildings.