HTML (Hypertext Markup Language) is the standard markup language used to create web pages. It uses tags to define the structure and layout of a web page. Some key points covered are: - HTML pages are defined between <html> </html> tags and have a <head> and <body> section - Common tags include <p> for paragraphs, <h1>-<h6> for headings, <img> for images, and <a> for links - Lists are defined with <ul> for unordered and <ol> for ordered lists, using <li> for each item - Tables are created with <table>, <tr> for rows, and <td>