Element of
Fonts and Web Typography
What does <q> do?
The <q> element is used to identify and inline quote that does not require paragraph breaks. Longer quotations that do require paragraph breaks should use the <blockquote> element.

Defining Quotes

<q> defines an inline quote in a block of text. Ordinarily, browsers should place quotation marks around the quote, although Internet Explorer does not. For this reason, <q> is rather under-used. If you need to define a quote that is longer than a single sentence, use <blockquote>.