Well, apart from the reality that it works better than something else, there are two extremely great reasons:
First, a serious campaign of article marketing will increase traffic to your web website or blog. Let's presume to get a minute that you simply submit an write-up to 200 Article Directories and each one outcomes in only three visitors to your website. That could be 600 visitors that you'd not have had otherwise. Keep in mind that's just 1 article. What if you had 5,10, twenty or more articles? 20 times 600 is 12,000. That's a fair amount of Extra traffic.Second, submitting articles creates serious backlinks. Consider that for a moment.