Copy is written text of an ad, brochure, book, or Web page. It's all the words. The main text found in publications we read — body copy — is the text of the stories and articles. Body copy is not the headlines, subheads, captions, or pull-quotes.
Body copy is usually between 8 and 14 points in size and legibility is the key to selecting fonts for body copy. The exact size depends on both the typeface and the known preferences and expectations of your audience.