What about duplicate content?
New PLR users are often concerned about a 'duplicate content penalty' from search engines.
But this problem is easy to avoid.
Google defines duplicate content as content duplicated on the same domain. So unless you are using the same PLR article with no changes on several pages within one domain, there is no need for concern.
It is generally expected that PLR users will customize the PLR before publishing it. This makes the content unique to your brand: no one else will have the same article that you have.
Learn more about customizing PLR here.