Summary Block - Grid Format
This page has 2 Summary Blocks in it, both of which are using the Grid display. These are pulling in blog posts from the Sample Blog. You can use this type of display instead of your template's normal Blog page, if you don't like how the template's default Blog page looks.
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 post shows the different ways you can crop images in Squarespace.
Here's an example of how you can use a Summary Block to show a Related Posts list at the bottom of your blog posts.
Not all templates use the Promoted Block feature. The ones that do, show the first image in a special way that makes it stand out.
Summary Block - Grid Display
Alternate version. This time, it's showing square images and no excerpts.