wordpress.com stats and google analytics

What does the below mean? I went into the Editor page???? and saw all the codes but don’t see the the </body> tag you all are talking about. I’ve never dealt with html codes so have no idea what I’d be doing. I’m using the “Live 1.1.6 by Herdo.com” theme. I’ve added Google Analytics on my blog because the wordpress.com stats weren’t working. On WordPress.com stats I keep getting the message about the API code being used by another account, but the acct is mine.
I’m not understanding these instructions:
“If that’s a link then your blog is not outputting either Google Analytics or WordPress.com stats code.

Check your theme’s footer.php and make sure you have <?php wp_footer(); ?> in there before the </body> tag.”

I’m really hoping I can get this resolved. I’m new to this so some of the stuff I’ve been reading has been really confusing. Please help, someone.