There may be several reasons why you might want to duplicate a WordPress page.
You may want to change the appearance of your existing page, or you may want to completely update the content.
You can simply “copy and paste” content and save it to a.doc file, or you can save it to a draft for a while. But what about SEO optimizations and other things that hurt?
The best way to get rid of this problem is wordpress duplicate page and test all the experiments without interfering with the actual page.