You can import the demo in your existing website but it is not recommended. Importing the demo in your website does not delete your content. It just adds the new contents, settings and the design which you have created previously might not be the same after the demo is imported. Therefore, we highly recommend you to import the demo on a fresh WordPress install rather than importing on the existing website.
Can We Import Demo in Our Existing Website?
Updated on August 5, 2020