An HTML element is defined by a start tag, some content, and an end tag. HTML Elements The HTML element is everything from the start tag to the end tag: < tagname > Content goes here... < /tagname > Examples of some HTML elements: < h1 > My First Heading < /h1 > < p > My first paragraph. < /p > Nested HTML Elements HTML elements can be nested (this means that elements can contain other elements). All HTML documents consist of nested HTML elements. The following example contains four HTML elements ( <html> , <body> , <h1> and <p> ): Example < !DOCTYPE html > < html > < body > < h1 > My First Heading < /h1 > < p > My first paragraph. < /p > < /body > < /html > Example Explained The <html> element is the root element and it defines the whole HTML document. It has a start tag <html> and an end t...