The term ‘orphaned content’ refers to articles that don’t have any links from your other articles or posts. Because of that, these articles are hard to find, both by Google and by users of your site. Google will consider this type of content less important. So, if an article is important to you, make that clear to Google (and your visitors) by linking to that particular article from other (related) content. Read more about solving the problem of orphaned articles in our article about orphaned content.