Once you have submitted the article it will undergo a review process – the directories do this to ensure the articles are actually useful and relevant rather than simply advertorials. It will then be approved and available to read on the site. From here people who are interested in republishing the article on their own sites/blogs can do so as long as they reproduce the content exactly as you have submitted it. If the article is well-written and informative it has the capacity to go viral which is the ultimate goal, as the more times it is republished, the more links you will acquire – and all at no cost to you.