You can add Meta Tags into the HEAD section.
using the
name attribute you can define the
description as well as
keywords.
using
content write the value of given attribute.
See Below Code :
<head runat="server">
<title>This is My Site</title>
<meta name="description" content="Enter Description">
<meta name="keywords" content="Enter Keywords">
</head>
Hope this will helpful to you....