An activation code for a Neopet is a password that players need to enter to activate an account. Players receive an activation code via email shortly after signing up for the game.
"Neopets" is a virtual pet site where users can create up to four virtual pets. Pets start out small and need to be groomed, fed and played with so that they can grow. Pets are highly customizable, allowing users to change their look, gender and personality. "Neopets" also functions as a social network, allowing pet owners to post on forums, chat with other users and join a guild with other members.