Related blog posts are similar to categories, in that they "link" specific posts of yours to each other. This helps your readers find similar content much faster and easier and can help them navigate a much smoother reading journey, because your similar posts can be quickly navigated. Instead of the user having to search for more similar content, it will just appear in front of them!
Setting up related posts is very simple in Quickblog:
When you create or edit a blog post, simply click in the Related Posts field and select any previous posts you want to link.
Then when you have the Blog Navigation Menu enabled in the Blog Layout settings, the user will be shown the links to the related blog posts.