HTML data in HTTP response

The data in the body of the response is the information that is of use to the end user. It usually contains HTML-formatted data, but it can also be JavaScript Object Notation (JSON) or eXtensible Markup Language (XML) data, script code, or binary files such as images and videos. Only plaintext information was originally stored on the web, formatted in a way that was more appropriate for reading while being capable of including tables, images, and links to other documents. This was called Hypertext Markup Language (HTML), and the web browser was the tool meant to interpret it. HTML text is formatted using tags.