HTTP Headers are pieces of information sent between a web server and a client, like a web browser. They help both parties communicate effectively by providing essential details about the request or response. For example, headers can indicate the type of content being sent, the language preference, or the status of the request. There are two main types of HTTP Headers: request headers and response headers. Request headers are sent by the client to the server, while response headers are sent back from the server to the client. These headers play a crucial role in web communication, ensuring that data is transmitted correctly and efficiently.