<b> Bold Text </b>
<strong> Important Text </strong>
<i> Italic Text </i>
<em> Emphasized text </em>
<mark> Marked Highlighted Text </mark>
<small> Small Text </small>
<del> Deleted Text </del>
<ins> Inserted Text </ins>
<sub> Subscript Text </sub>
<sup> Superscript Text </sup>

Text formatting is used to define text with special meaning, also changes the way text looks.

<code> Code </code>
<kbd> Keyboard Code </kbd>
<var> Variables </var>
<samp> Sample Output </samp>

To define code in text.

<pre> Code and Text 
Made Here Keeps Spaces 
and Line Breaks </pre>

To keep spaces and line breaks as shown in code.

<blockquote cite="link to site"> 
Quote
</blockquote> <q> A short quotation <q> <abbr title=”word”> An abbreviation or an acronym </abbr> <address>
Contact information, email, URL, address, phone, social media
</address> <cite> Defines title of a creative work (poem, song, movie, painting) </cite> <bdo dir="rtl"> Current text direction </bdo>

To define quotations.