What Are "Private Label Rights"?

Private label rights allow you to make another author's work show like it's your own by changing its content (if you like), and it's complete claim to authorship. That can vary from writing an introduction paragraph or editing the title to completely modifying it any way you want and add your name to it as the creator (with or without the condition that you HAVE to modify the content). Anything allowing you to change the content (except branding an affiliate link) is called Private Label Rights.