Type(タイプTaipu) are attributes or property of Pokémon species and moves. They lay the foundation of a complex yet mostly logical "balance of powers" system that applies to every Pokémon and their respective moves. Some advantages and disadvantages are based on common sense (e.g. Fire-type Pokémon being weak to Water-type attacks), while others are not as obvious (e.g. Fire-type attacks being strong against Steel Pokémon, possibly because fire melts metal). Each type has three specific functions: which types of Pokémon it is super effective against', which types of Pokémon it is not very effective against, and which types of Pokémon it is completely ineffective against.