1. Headings

There should be only one heading 1 in entire website and try to make use of other headings.

<h1>Heading 1</h1>
<h2>Heading 2</h2>
<h3>Heading 3</h3>
<h4>Heading 4</h4>
<h5>Heading 5</h5>
<h6>Heading 6</h6>

2. Paragraphs

A paragraph always starts on a new line, and browsers automatically add some white space (a margin) before and after a paragraph.

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