For Google and other search engines, nofollow means that link won’t improve your rankings, it won’t transfer any PageRank.
A nofollow attribute looks like this:
<a href=”[link]” rel=”nofollow”>[anchor]</a>
Firefox and Chrome browsers extensions and plugins to check nofollow links
Manual check nofollow links
- Visit the page you want to check for nofollow links
- View Page Source (usually CTLR+U) or go from browser menu
- Search (CTRL+F) for the link you want to see if it has nofollow
- Check for rel=”nofollow” attribute in the link
In Google Chrome, there is a very simple manual checking method: Right click the link you want -> Inspect Element
Don’t forget that a webmaster can add nofollow to your links at a later date. You can get alerted via email if you add the links to be monitored in Monitor Backlinks.