What is the name of the second section of a web page that contains all the data to be displayed?

The body of a web page is the main section that contains all the content meant to be displayed to the user. This includes text, images, videos, and other media elements that are visible when a user accesses the page. The body is where the core information resides, making it crucial for the user experience and usability of the website.

The header typically includes the page title, navigation links, and other introductory elements that appear at the top of the page but do not contain the main content. The footer usually holds information such as copyright notices, additional links, or contact details and is located at the bottom of the page. The sidebar is an optional layout feature that can contain supplementary content such as links, advertisements, or additional navigation options but is not the primary section containing the main data displayed.

Therefore, identifying the body as the section where all visible data resides is vital for understanding the structure of a webpage in HTML and web design.