So, I have a website with around 100 or so posts, almost all of them highly optimized for different long tail keywords. Some of those keywords are listed in Wikipedia so I considered testing whether a link from Wikipedia will help or not. Case study 1: 3,550,000 results for a 4-word keyword Two weeks after it was published the article was ranking on bottom of page 3. Placed the link to Wikipedia as external link with the anchor being the exact keyword. 4-5 days after the post ranks on page 1 position 8 and it's still there after a week or so. Case study 2: 912,000 results for a 3-word keyword Almost the same pattern here, thus it was on top of page 3. Now it ranks on page 1 position 10. Case study 3: 4,322,00 results for a 1-word keyword This was supposed to be a more difficult one (although it is not a commercial keyword, more of a medical disorder). Was on page 6 for weeks - 2-3 days after placing the link in Wikipedia I am on bottom of page 1, position 9. I must add that no link building was done to any of those 3 posts. Now, I do not say that links from Wiki are the holy grail nor that they really pass anchor text, however it might be the authority they send to those certain pages (which were highly optimized - onpage) gives them a great push ahead. Has anyone noticed similar benefits when getting Wikipedia links?