# What are elements in HTML5? The HTML element is everything from the start tag to the end tag: <tagname>Content goes here...</tagname> <section> <article> <aside > <figure> <footer> <header> <hgroup> <nav> <audio> <video> HTML elements can be nested (this means that elements can contain other elements). <!DOCTYPE html> <html> <body> <h1>My First Heading</h1> <p>My first paragraph.</p> </body> </html>