Token is the secondary currency relative to the popularity points. It is the second most major currency in the game after the popularity points, being useful for a plenty of upgrades as an alternative to popularity points, and is easily accessible early in the game. It can be converted from popularity points.
Conversion (key: P = popularity point, T = token):
Popularity to token: sqrt(P)/256
Token to popularity: (TĂ—256)^2