Why?
If you create content online you want it to reach the largest possible audience. One solution is to publish it on many platforms. First on your own blog, then as a guest on other publications like Huffington Post, Medium, Facebook, LinkedIn etc. Currently, you need to create copies of the original (and hopefully tag it so that Google doesn’t consider it duplicate content), which means there are many different unsynced copies.
How?
Created a mechanism where the other places that are also publishing your article dynamically get it from your original source, with some added optional context (like explaining where it was originally published.) This will keep all copies in sync with your original one and guarantee your control over it. At the same time, it will be easier for the other publications to insert it anywhere they want.