In most of the cases, your cat will meow back at you to get your attention. Also, some cat breeds might simply be more talkative than others; for example, the Siamese cat. A cat might also be meowing back at you due to some health issue.
While excessive meowing can become frustrating, it’s important that you don’t ignore your cat. You should only do this if you’re absolutely sure she’s just meowing out of boredom or to seek your attention.