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                                       3. HTML-ELEMENTS

An HTML element is defined by a starting tag. If the element contains other content, it ends with a closing tag, where the element name is preceded by a forward slash as shown below with few tags:

Start Tag                           Content                            End Tag

<p>.                       This is paragraph content.         </p>

<h1>                      This is heading content.             </h1>

<div>                    This is division content.              </div>

<br />                    This is breaking content.             —

So here <p>...</p> is an HTML element, <h1>...</h1> is another HTML element. There are some HTML elements which don't need to be closed, such as <img.../> <hr/> and <br /> elements. These are known as void elements.

HTML documents consists of a tree of these elements and they specify how HTML documents should be built, and what kind of content should be placed in what part of an HTML document.