This is it: 
<head>
<meta name="keyword" content="[my keywords]..."></meta>
<meta name="description" content="[my description]"></meta>
<title>All you need to know about...</title>
</head>

This is what the server is telling me:

The element type "head" must be terminated by the matching end-tag.

Your meta tags must be self-closed – e.g.

<meta name="keyword" content="..." />
<meta name="description" content="..." />