Link Building is the best way to increase page rank of our site. There are two types of Links first Do Follow which is mostly liked by the search engines and give profit to our website as page rank. And second No Follow links which are not accepted by the search engines and there will no be any effect of this link on our website. I think its harmful for our site. If anybody have more information about these links please share.........
No, Nofollow give you traffic and helping to crawling your website . both link has value but do follow has more value in sense of page rank.
A nofollow backlink is opposite to a dofollow backlink. No follow links forestall search engines spiders to crawl the link. So, if you're obtaining a backlink from a nofollow web site, it doesn't pass the link juice. But we cannot say that nofollow links don't seem to be helpful for any web site as a humans don't seem to be bounded to nofollow the links and if you'll drop a comment or participate during a nofollow blog or forum then it'll still helpful as a result of these also are useful in bringing huge quantity of traffic. Do follow Link is a hyperlink that is able to tell all search engines to pass along it’s page rank influence to an outbound link. Therefore, it will be very untrue to say that no follow links are not important . Both no follow and do follow links share the equal importance in terms of link building. If a website has only do follow links then it may point to be spam website. So mixture of both no follow and do follow links make your link profile look more natural. Hope this solves your query...