Coincidence of wants can be explained as "economic phenomenon where two parties each hold an item the other wants, and therefore exchange these items directly. This means that on CoW Protocol, when two trades or more, each hold an asset that the other wants, their orders can be settled directly between all of them without the need for an external market maker or liquidity provider. Cow Protocol can create CoWs in a two dimensional orderbook, but can also create them on a multi-dimensional orderbook.