Cats communicate with humans primarily through body language and vocalizations. Cats use a variety of vocalizations to communicate with humans, such as meowing, purring, chirping, and hissing. Cats also use body language to communicate, such as tail twitching, ear flattening, and direct stares. To better understand cats, it is important to pay attention to their body language and vocalizations, and to try to interpret what they are trying to communicate. Additionally, it is important to provide cats with a safe and comfortable environment, as this will help them to feel secure and less stressed.