I have a blog on a certain niche and all of my articles are paid and ordered from different article writers on different sites ( upwork / peopleperhour ) etc. Well i guess some of the articles are good and planning to order more in the future. I want to know the ideas on how to hire a good article writer that can write good product reviews? I mean do i have to tell them what to do and not to do? is there any rule on how to hire a good writer to write review on a certain product?