The document lists HTML 5 tags and whether they are new in HTML5 or not. It provides the tag name, a brief description of what each tag specifies or does, and if the tag is new to HTML5 or supported by browsers. Some of the new tags in HTML5 include <article>, <aside>, <details>, <figcaption>, <figure>, <footer>, <header>, <main>, <mark>, <nav>, <section>, <summary>, and <time>.