Cats meow for a variety of reasons, including to get attention, ask for food, and express emotions.
Cats meow to get their human's attention. This could be because they want to be fed, played with, or simply want to be petted.
Cats meow to ask for food. This is especially common if they are hungry or if their food bowl is empty.
Cats meow to express emotions such as happiness, sadness, anger, and fear.
Cats may meow when they see you as a way of greeting you. This is a sign of affection and bonding.
Cats may meow to soothe themselves when they are feeling stressed or anxious
Although cats don't meow to each other as much as they do to humans, they will still meow to communicate with each other.