Contextual Link Building is a very new process which is a unique way of site promotion. It is done by creating back links in the content. Search tools are always looking for new and unique contents; if your website has some exceptional content then it can be on the top of the search results. Article submission is one of the best ways of this process. You can easily submit in-content responses with an article of 300 to 400 words. But to be on the safer side you need to insure that your blog is set up on an exclusive IP. To get more profits you can even try getting back links from high PR and popular blogs.
This method is slowly becoming a popular SEO strategy but it should be done very safely and properly. If you submit a single article to a large number of article directories then your article can also be penalized. For getting the maximum number of responses the article should be original, there should be less use of the key words and the text should be relevant.
So, before you start with the process, you should be very accurate about the content you publish and submit.