Robson, I think I have mentioned this before, some search engines require them and others don't. I put them into my websites regardless, since I want my site to be as accessible to as many search engines as possible. Do you want to possibly restrict your sites?
Here's the meta tags I use:
Code:
<meta http-equiv="Content-Type"
content="text/html; charset=iso-8859-1">
<meta name="keywords" content="web designers, etc...">
<meta name="description" content="Think outside the square - Website Design, graphic design, logos, business identities, photo retouching, web development and services. With a NZ designers touch.">
<meta name="robots" content="index,follow">
<meta name="resource-type" content="document">
<meta http-equiv="expires" content="0">
<meta name="author"
content="NZ Web Design, Graphic Design and Web site Design by www.circle.co.nz">
<meta name="copyright"
content="Copyright © 2004 by Circle Design with www.circle.co.nz">
<meta name="revisit-after" content="5 days">
<meta name="distribution" content="Global">
<meta name="rating" content="General">