Meaning of NoFollow
Google search algorithm depends heavily on the number of links to a website when determining which websites should be listed in what order in their search results for any given term. Now, however, new information suggests that Google search engines will depend less on links in the future and more on other aspects such as mentioned that don't include links.
The Nofollow is a value of HTML attribute was originally used to stop comment spam in blogs. It is entirely effected blogging community. Actually, it instructs some search engines that the hyperlink should not influence the ranking of the link's target in the search engine's index and Not follow in order to maximize the PageRank of the other pages.
You can easily instruct robots not to crawl a specific link. For example:
<a href="signin.php" rel="nofollow">sign in</a>
Source - http://en.wikipedia.org/wiki/Nofollow
The Nofollow is a value of HTML attribute was originally used to stop comment spam in blogs. It is entirely effected blogging community. Actually, it instructs some search engines that the hyperlink should not influence the ranking of the link's target in the search engine's index and Not follow in order to maximize the PageRank of the other pages.
You can easily instruct robots not to crawl a specific link. For example:
<a href="signin.php" rel="nofollow">sign in</a>
Source - http://en.wikipedia.org/wiki/Nofollow
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