For those of you who are not familiar with the Single Post Template yet, the single post determines the layout of your blog posts. For single posts, you use dynamic widgets to build the blog post template.
To make it easier to design live, you can preview the template with any of your previously created blog posts. This way, all the dynamic widgets get populated with actual content from your site. Here is an article explaining how to use single post template.
Even after you publish a single template, you can access any specific blog post that uses the template and design it further with Elementor.
You can choose what kind of use you make of the templates. Many users will implement them as is, without making any customizations. Others will change the color palettes or fonts, or resize the image, and that will be it.
Others, probably the more advanced users, will break the templates down into particles so they can “study” them, and draw creative ideas from them.