Cats communicate with each other by urinating and rubbing against objects like trees. So when cats want to communicate with people, they usually urinate on the carpet, crap on the floor, and rip sofas apart. Then sometimes they meow.
Meowing is a vocal form of communication that cats use to communicate with their human servants. By learning to interpret your cat’s meows, you can better serve your cat. For example, a long drawn out meow means your cat is demanding something, which is often more urgent than a short meow, which means you cat is just happy to see you so you can start serving it right away.