Communities

Miiverse is mainly based around communities. There's one usually for each game and application on Wii U and 3DS. There also special communities, often designed to celebrate a certain occasion, or just give a lace for a certain group of fans to talk about a topic that's been neglected (Zelda community was created due to lack of Zelda community, Smash Bros series community created for similar reason, etc.)

List
Many communities have varying popularity, regions, and traffic. The list shall be shown in this format:

Community name:Regions:Traffic

Communities listed mainly by relevance

YouTube:All:High

Super Smash Bros. Series:Divided:High

Super Mario 3D World:All:Very high

The Legend of Zelda: The Wind Waker HD:All:High

Hulu Plus:All:Mid