The aside format is typically displayed without title or author information. It is simple, short, and minor. The aside could contain perhaps a paragraph or two and very likely does not have a link to the single post page.
Aside is an extra bit of information that a blogger may want to provide to their readers without writing a standard post about it. It could be an external link, reference to a discussion carried out elsewhere on the web, or an interesting piece of information that does not fit in the regular scope of the posts.
Don’t forget to read other posts of this blog 🙂