This document introduces HTML (Hypertext Markup Language) and describes some of its basic tags and features. It explains that HTML is a markup language used to structure and format web pages using tags. It then lists some common HTML tags like <html>, <head>, <title>, <body>, <h1>-<h6> for headings, <b> for bold, <i> for italics, and <a> for links. The document provides examples of simple HTML pages using these tags to demonstrate headings, paragraphs, lists, tables, forms, and more.