Nofollow links are also consider but they are helpful to increase a visit. They are not helpful to increase the ranking of your website. So that we give the preference do follow backlinks more.

Google will never count no follow links as backlink. Other search engines are Considers. But i think no follow will never help to get search engine ranking. It will just increase traffic.

No follow links are not at all useful. They are not helpful to increase the ranking of your website. So that we give the preference do follow back-links more.

Nofollow links are the links which instructs the crawlers to not crawl the link. These type of links doesn't pass the link juice and doesn't help to increase keyword ranking but are effective to drive the traffic towards website.

Nofollow links are helpful as dofollow links because there is need to maintain the ratio of both the links. Nofollow doesn't helps to get the keyword ranking but drive the traffic to your website.