A canonical URL is an HTML element that prevents duplicate content. This helps prevent SEO issues by indicating whether a URL is a "canonical" or "preferred" version of a page.
You can easily change the "rel=canonical" of a post by putting your desired URL in the Advanced Settings tab of our Entry Editor:
From there, insert a URL in the Source URL field to set your article's canonical URL. You can even choose if your post links out directly to it, or just references it in the source code.
Here's a video of how it works:
If you have questions about this feature, please contact your account manager.