For highlighting a run of text due to its relevance in another context, use the <mark> tag.
You can use the mark tag to highlight text.
For indicating blocks of text that have been deleted use the <del> tag.
This line of text is meant to be treated as deleted text.
For indicating blocks of text that are no longer relevant use the <s> tag.
This line of text is meant to be treated as no longer accurate.
For indicating additions to the document use the <ins> tag.
This line of text is meant to be treated as an addition to the document.
To underline text use the <u> tag.
This line of text will render as underlined
For de-emphasizing inline or blocks of text, use the <small> tag to set text at 85% the size of the parent. Heading elements receive their own font-size for nested <small> elements.
You may alternatively use an inline element with .small in place of any <small>.
This line of text is meant to be treated as fine print.
For emphasizing a snippet of text with a heavier font-weight.
The following snippet of text is rendered as bold text.
For emphasizing a snippet of text with italics.
The following snippet of text is rendered as italicized text.