pelican-mg/templates/common_seo.html

{% block seo %}
<meta property="og:title" content="{{ SITENAME }}" />
<meta property="og:type" content="website" />
<meta property="og:url" content="{{ SITEURL }}" />
<meta name="twitter:url" content="{{ SITEURL }}" />
{% if OG_IMAGE %}
<meta property="og:image" content="{{ OG_IMAGE }}" />
<meta property="og:image:type" content="{{ OG_IMAGE_TYPE }}" />
<meta name="twitter:image" content="{{ OG_IMAGE }}" />
{% endif %}
{% endblock %}