Wordpress Tag as Keywords

I found this little snippet that can give more SEO friendly functionality in your Custom Wordpress Website.

/* Put this code in header.php */
/* Function that hook the Post tag as Keywords */

<?php
    $postTags = get_the_tags();
    $tagNames = array();
    foreach($postTags as $tag)
    {
        $tagNames[] = $tag->name;
    }
?>

<meta name="keywords" content="<?php echo implode($tagNames,", "); ?>" />

Here's the link to his post.