Step 1: Understand that HTTP stands for Hypertext Transfer Protocol, which is used for transferring data on the web.
Step 2: Know that an HTTP header is a part of the HTTP request or response.
Step 3: Realize that the HTTP header contains important information, called metadata.
Step 4: Identify that this metadata includes details like the type of content being sent (e.g., text, image) and the size of that content.
Step 5: Conclude that the main function of the HTTP header is to provide this metadata to help the server and client understand how to handle the data.
