Organic SEO Blog

In an attempt to eliminate spamming, Wikipedia has added “nofollow” tag to all outbound links. The “nofollow” tag was introduced a while back for webmasters to tell the major search engines to ignore the specific link. When Google sees this tag, the outbound link is passed by as if it were regular text.

Thus, if you have links pointing in from Wikipedia they will be lost, at least in terms of helping with your SEO campaigns. Links come and go all the time, but to lose a Wikipedia link is a big deal as it is a highly regarded site in the eyes of the search engines and its credibility with Google would mean the link would have a significant ranking value.