⚠️ Note that this post hasn't been updated for at least a year and the information may be outdated, proceed with caution! (Last updated: September 24, 2019)
Sometimes you might not necessarily want to add featured images to all of your pages or blog posts, but you don't want it to default to the first image on the page when shared elsewhere.
You can set a default og:image tag on your template by adding this snippet to the <head> section of your template:
{% raw %}{% if !content.featured_image %}
<meta property="og:image" content="https://www.yourdomain.com/hubfs/yourimage.jpg" />
{% endif %}
It will check whether a Featured Image has been added and, if not, add an og:image tag to the head with the image you've entered above.
