The “nofollow” attribute refers to an insertion of html code within the source code of a web page effectively instructing search engine bots not to follow a particular link to its specified destination.
The source code appears as follows:
This is also shown below in html as you can see, if you have a firefox SEO add on, to detect “nofollow” links.
The “nofollow” attribute was a creation of Google sometime around 2005, ostensibly to counter spamming. To what extent this objective has been achieved is debatable.
The “nofollow” attribute has the following consequences for the web page at the specified destination.