Article Submissions means you can give your well written article to the content hungry publisher to publish it for free of charge. In return you will get back link to your website via resource box put at the end of the article.There are article directories naturally who has higher page ranks and back linking from those sites mean search engine juice flow towards your site. You can get direct benefits from it. By writing some thing on your niche market you can establish yourself as a representative or expert of your niche thus you can enhance your brand directly or indirectly through your product awareness