First of all, I'd like to tell you that whether it be a No-Follow or a Do-Follow, both types of links contain authority and although Do-Follow passes link juice to the website, but No-Follow still helps establish credibility. A Do-Follow link is like a referral, a signal for Google crawlers to understand that X is an authority agreeing to pass value to Y (where Y is your website). More like X is telling crawlers that Y is a credible site and I am providing you access to follow it. Whereas, No-Follow link is a credible link but it does not allow crawlers to follow the link back to your site.
Nofollow links attributes do not allow search engine bots to follow the link. Dofollow links allow Google (all search engines) to follow them and reach the website.
Nofollow links attributes do not allow search engine bots to follow the link. That means if the website owner is linking back to you with nofollow attributes, it does not pass on link juice. Only humans will be able to follow the links. Though some time back Google made it clear that they don’t consider nofollow link attributes but weightage of such links are really less. Even though, it’s a good practice to use nofollow link attributes to those link, where you don’t want to pass link juice.
Dofollow links allow google (all search engines) to follow them and reach our website. Giving us link juice and a backlink. If a webmaster is linking back to you with this link both search engines and humans will be able to follow you. The best way to give someone dofollow love is allowing keyword in the anchor text. This means when you are linking to any website or page, use the targeted keyword as anchor text.
No Follow tells bots and search engines to NOT show these links to people. Similar to NO Index, which means not to add that link to their search results. The other is obvious.
A Dofollow link is a hyperlink that allows search engine and humans to follow it. It passes through the link juice so that it receives links from high-authority sites and is indexed. A Dofollow link is important and plays important role in increasing your Search Engine Related Pages (SERPs) as well as Domain Authority (DA).
Google (Dofollow Link)
A NoFollow link is of no use considering SERP but can help to drive traffic to your blog. It does not play any role in improving the SEO ranking or visibility of your website.
NoFollow link contains Rel="NoFollow" attribute, which clearly instructs search engine bots not to index a particular link. This attribute allows crawlers or bots to simply ignore a link and link juice are not passed to it.
Only humans follow it and that is the reason for the traffic but no ranking.
Google (Nofollow Link)
Dofollow links are an HTML attribute that is used to allow search bots to follow the links. If a webmaster is linking to your site with a Dofollow link, search engine bots and people can follow you. They pass on link juice and really benefit your website to get a high Page Rank.
Google takes notes of dofollow links and figures on how many users are linking to your page in order to get how really good the page is. The more Dofollow links you have, the more points you will get. The best way to give the follow link is to use the keyword as the anchor text. It is important not only to get Dofollow links from anywhere but to gain a follow link from a reputable website.
If you can post a link on New York Times or CNN, you will cut a melon!
Dofollow links are links that can help you to increase page rank, gain more SEO points and boost link juice what makes your site highly ranked in SERP. Dofollow links are real votes of credibility by Google.
Nofollow links without SEO value.
Nofollow links don’t allow search engine bots to follow your links. These links don’t pass on link juice. Only people can follow these links. They don’t help you to boost page rank, website rankings and have no SEO value. It is a notice for a search engine not to count a link.
As we know Nofollow links don’t pass any link juice but it can help to get traffic on your website. I guess you’ve noticed many times the nofollow rel tag. If you use the nofollow link HTML tag, you won’t do any harm for your website. Search engines even respect this tag.
The Nofollow tag can be good for SEO – most webmasters use this tag not to follow untrusted content. These links belong in paid links, forums, blog comments, and some untrusted content.
Google have recently noticed that they will count Nofollow links to boost PR for your page. But it depends on where the link is placed and the quality of it. If you place it at the beginning of your text, it will give more impact than if you post it at the bottom of the page.