If you get a backlink from a dofollow website you will get page rank link juice. If it's a no follow backlink you can't get that linkjuice.
Dofollow follow your link & give you link juice but incase of nofollow you will not get any backlinks juice.
Any regular link, if you do not specify nofollow is a dofollow link. If you specify nofollow, it tells search engines not to follow the link. If you have nofollow links to other websites from your site, your link juice will not be distributed to them. Same way, when other sites link to you, if they specify that it is nofollow link, you would not get any back-link juice.
A "nofollow" link is an HTML attribute that is used to give instructions to search engines that the hyperlink is not to influence the ranking of the search engines index.
"Nofollow" provides a way for webmasters to tell search engines "Don't follow links on this page" or "Don't follow this specific link." Hope this helps you understand.
Dofollow links pass page rank, Nofollow ones do not. Both contribute to associating a website with the anchor text in them, though.
That's how I understand this as well. But how certain is that. Also, how certain do search engine crawlers recognize something as Nofollow?
Dofollow - Search engine follows through that link and pass the PR juice in to your site. Nofollow - Search engines still follow through that link but PR juice won't be passed in to your site. Some people say search engines do not follow those nofollow links. But I am bit confused on actually what is happening in search engine algorithms
You need to qualify some of the statements. nofollow has nothing to with indexing or crawling, so when google came up with the nofollow tag, it was misleading. The PR is not passed on. That's it. People keep insisting that if the nofollow tag is not there, then it gets the juice or is "followed." But again, nofollow or not has nothing to do with following. You cannot force google to count a link. Too many people are under the impression that if a link on a site does not get a nofollow tag, then google will count it. There are so many intangibles when it comes to google counting a link that any statement must be qualified with "might." Google might count the link. Too many people use the nofollow tag for reasons that were not intended. And too many people seek out links without the "nofollow" tag thinking that just that fact makes it count. It doesn't. Google may not decide to count your link on certain sites no matter what. No such thing really, as dofollow. More like "please follow." Stephen C
Search engines do follow "nofollow" links though. Tests have shown even google will. They just wont pass any page rank so it is good for deterring people who just post a link to get the linkjuice to their site.
I understant that nofollow are the link that have in the HTML code , the tag nofollow. With this tag the google crawler will not craw your link.
.... According to many here, they do crawl, but not use it for PR rank. Some also claim it has influence on the keyword you may rank high with.
It crawls even if it's noFollow. It just doesn't give the link any value. I just wrote a blog post about doFollow - noFollow.
The code rel="nofollow" in the link tag doesn't works on google. It means that Google doesn't consider that link for ranking. Nofollow are often used on blog's comment (wordpress default setting) and on social network like twitter, but for your blog you can have some plugin for erase nofollow attribute from your comments.
No-Follow tags are not always bad! You have a No-Follow link pointing back at your site you get no "PR juice", but with that said you can use the same tag to distribute or control PR strength to your own pages. The no follow tag doesn't stop traffic from going to your page, but Google doesn't give you "credit" for the link in your seo efforts. Olive Garden Menu