HTML

Structure
Tag Meaning & Use
<head> Metadata about the page that is not displayed in the browser.
<title> Goes in the <head> element and displays on the browser tab.
<body> Everything in this element is shown in the browser window.
Text
Tag Meaning & Use
<h1> <h1> is used for main headings. <h2> to <h6> are used for subheadings.
<p> Paragraph. Each paragraph will be shown on a new line.
<b> & <i> Bold and italic.
<sup> & <sub> Superscript 123 and subscript 123.
<br /> & <hr /> Self-closing. Line break and horizontal rule.
Semantic HTML
Tag Meaning & Use
<strong> By default, appears bold to indicate content with strong importance..
<em> Emphasis. By default, appears italicised to indicate emphasis that subtly changes the meaning of a sentence.
<q> Quote. For shorter quotes that sit within a paragraph.