Behaviorists say that cats meow at humans because they want something and, most important, because meowing gets results.
But cats can meow at varying frequencies, pitches, tones, volumes, and lengths. A meow imploring you to open the back door, for example, can sound completely different from the excited, “I’m about to be fed” meow, which is totally different from the meow that happens right before you scratch her right behind her ear at bedtime.
Cats are capable of making 30 different sounds. They can meow because they want food, because they hurt, stressed and probably because they are getting old.
I love my cat simply cos its beautiful and it communicate well with me.