This is a blog post excerpt, which is showing instead of the full body text of the post. This post also has a thumbnail image associated with it. In this template, if you set both of these, then they will both show on the main Blog Page.
This is a Squarespace Blog post with a location attached to the post. Some templates show the location as a map link. This one does, and you can see that location link below.
This blog post has a full-width image at the top of the post. Sometimes this can mean lots of scrolling before you see content. It also has a video in it, too.
This is a blog post excerpt, which is showing instead of the full body text of the post. This post also has a thumbnail image associated with it. In this template, if you set both of these, then they will both show on the main Blog Page.