You use a meta tag.
<META NAME="author" CONTENT=XXXXXXXX, XXXXXXXXXX XXXXXXX, XXXX>
<META NAME="description" CONTENT=XXXXXXXX, XXXXXXXXXX XXXXXXX, XXXX>
<META NAME="keywords" CONTENT=XXXXXXXX, XXXXXXXXXX XXXXXXX, XXXX>
But don't bother. Because of all the spamers and lamers, most search engines now ignore meta keywords or weight them as rather insignificant compared to link popularity, click throughs, and dynamic parsing of content. There's no guaranteed way to get your page to come up for a specific request. So the moral of this, is build a good site and people will come.