If you define a class, you can apply its style to many different kinds of elements.
... like Paragraphs ...
... and BLOCKQUOTEs,
and any other element ...
Here we apply the same style to a P and a BLOCKQUOTE by giving them the same style class, redbold.
The CLASS attribute is a powerful way to group elements of different kinds which share the same basic style. See the next page for the HTML markup.