What are Do-follow & No-follow Links??

[batman]

Can anybody explain to me what are do-follow & no-follow links??

No-follow links are those links which are present in a webpage as hyperlink but they are not allowed to be crawled by the search engine bots which comes to crawl that particular webpage. The anchor text is like below:
<a href=”http://www.google.com/” rel=”nofollow”>Google</a>
A do-follow links are those links whcih are present in a webpage as hyperlink but they are allowed to be crawled by the search engine bots which comes to crawl that particular webpage. The anchor text is link below:
<a href=”http://www.google.com/”>Google</a>