Better page description with image for Facebook and Twitter.
<meta property="og:type" content="article">
<meta property="og:url" content="{page_url}">
<meta property="og:title" content="{title}">
<meta property="og:description" content="{description}">
<meta property="og:image" content="{image_url}">
<meta name="twitter:card" content="summary">
<meta name="twitter:site" content="@site_twitter">
<meta name="twitter:creator" content="@twitter_name">