Hi Many PLR articles are sold at extremely low prices. Almost all of these PLR have unlimited copies sold. If you add these articles to your site, wouldn't these articles be treated as duplicate content? In terms of SEO, how effective are cheap PLR articles? Thanks
If they are selling them as unlimited, then they will definitely get tagged as duplicate content somewhere along the line unless you rewrite a lot of them to make them unique. If they're duplicates, they're pretty much worthless. But you could use them as a useful starting point to write your own unique content.