When I share a post to Twitter, it does not include any image in the tweet. To be clear, I am copying and pasting a link in twitter and then publishing it.
I have thought that perhaps I needed to set a featured image, but that also did not work.
How can I tweet so that my featured image is included?
The solution from @tiago is great–it lets you set a custom image for Twitter!
By default, your feature image–if set–will be used on Twitter.
A great tool to preview how things will look on Twitter is the Twitter card validator, which will give you a preview of what your link will look like on the platform.
Ghost also generates a Twitter preview for you. When on a post, click Preview and then on the Twitter icon.