Link building is considered to be as a base of Optimization process and when it comes to do follow links even Google considers such inbound links as a vote to a website. Such back links can help you to increase the page rank of the website and by the time improve creditability of the website from Google point of view. Hope each SEO and Online marketers are well aware about the fact so they are looking for varied ways to generate do follow back links for the website or any particular web page. Though it was a time when do follow links was easily available by placing links in any of the website, but this has induced spamming activity and Google had to roll out No follow attribute to get rid of link spamming. So now if you are able to place a link in a website but such links are no follow than Google will not consider it provided if such link are from high Page rank and niche website.