I'm not 100% clear on your question, but you can change the meta/title tags that appear on your main index page by adding text to those tags in the default/header.html file- including adding keywords.
Example:
<title>{site_name} photos videos pictures fan site</title>
<meta name="description" content="fan site - pictures, videos, photos.">
<meta name="keywords" content="Reunion, Girls Club, stuff magazine">