Adult cats rarely meow to or at each other. Kittens meow primarily to get their mother’s attention. Once a cat becomes full-grown, it uses body language, visual marking and scent. The meow seems to be a communication method directed mostly at humans most likely because it works. Cats are very smart and quickly learn if a meow got a desired result the first time, it will do it again. Additionally, because we’re such a verbal species, we seem to respond best when our cats meow to us over other forms of communication. This fact is proven over and over again as humans are repeatedly scratched or bitten because they misread their cats’ body language signals.