You will happen to see that some people manage to create the preview of their blog post by entering 3-4-5 images or more as a sort of images inside a navigable carousel gallery.
Here is an example of how these types of posts are presented
How to do?
Simple, when you go to paste the post of your blog or site click on the “+” you see at the bottom of the post and add the first or second image. do so then for the others to follow.