I am planning to outsource content writing for my new website. Tell me about these PLR articles? What are they and how does it work? Who researches and writes them?
Private Label Rights generally allow you to do whatever you want with it, check the license for what is and isn't allowed. Some plr is good and some is crap and it doesn't necessarily depend on price. It's best to rewrite plr articles especially if submitting to article directories. If you need plr stuff on an ongoing basis signing up with a plr membership site is the way to go. Otherwise i suggest paying for original articles.
PLR Articles can be freely used, edited or rewritten. In their standard form they are not overly helpful as they tend to be "overused" and the search engines all but ignore them. They are often also poorly written, that said you can rewrite sections of them to save time.
PLR articles should always be rewritten because there are so many people using the same article. The great thing about them is that they offer a good point of reference for you to write so it virtually eliminates writer's block. Add a few of these on with some of your articles from scratch and you'll have a great amount of content floating around.