We’ve added a few more ways to help your posts stand out: customizable post URLs and the ability to upload any image as a social preview.
Your social preview image is what gets displayed on social media (such as Twitter or Facebook) when someone shares your post. You can now add any image you’d like, not just one that’s already in your post.
You can upload a custom image from your post’s Settings page. Click “Upload new” under your current social image to add a new one.