Nofollow explained

[robertransey]

Here to talk about the nofollow. E 'was developed with three major Internet search engines. Web site owners can prevent search engines from crawling their site or give extra weightage to their site. However, it is important to understand that does not change the search engine. Therefore, do not assume that you are using nofollow external links should be protected page would be fine. FYI, the error does not comply with the tags or attributes. We have seen the value of a hat, can be used to anchor items rel.

[socialbookmark]

Nofollow means the value or pagerank of current page should not be juiced to external links. Its the real meaning on nofollow. But dofollow ones juice the pagerank to external links too. But both of them can be useful for making backlinks.