What is the role of headers in HTTP requests and why are they used?

HTTP request headers contain metadata about the request and the client. They allow the server to understand how to process the request, what data formats are supported, authorization parameters, content types, and much more.

For example:

• Content-Type indicates the format of the transmitted data.
• Authorization contains authentication data.
• User-Agent provides information about the client application.

Without headers, the server would not be able to correctly interpret the request and generate an appropriate response.