A white paper is an important piece of writing containing information of significant weight.
Article is a piece of writing which can deliver subjective ideas excellently. However, there are few things which should be considered by freelance writers to produce articles that are well-read.
Article writing is a simple and easy piece of writing. It is different from academic or other literary form of writing in many ways.
Sales copy writing is a piece of writing which involves writing in order to advertise something.