eHow is an online how-to guide with more than 1 million articles and 170,000 videos offering step-by-step instructions. eHow articles and videos are created by freelancers and cover a wide variety of topics organized into a hierarchy of categories. Any eHow user can leave comments or responses, but only contracted writers can contribute changes to articles. The writers work on a freelance basis, being paid by article. eHow is frequently called a content mill.