As your blog grows, it becomes important in keeping your content categorized and organized for users to find the articles easily. For this purpose, we have 'Post Types' in SubPage.
There are some post types by default and you can also create custom post types and manage them.
In the right sidebar inside the blog article editor, you can find the post type option.
Click on the dropdown and choose any post type to assign to that blog post.
This will also help you to filter the posts in your Blog page dashboard.