One of Brian Dean’s best guide (Anatomy of a Perfectly Optimized Page) includes how outbound links, such as links to the Wikipedia page from where a certain information was taken from, can prove to be benficial for SEO.

Outbound links

As many other tactics this can help, unless it will be abused. And that’s why SEO is a bit like cooking, even if you know all the ingredients, you still have to use them in the right amount.

To put a keyword in bold once at the beginning of an article or to put the keyword in bold every time it appears in an article can make the difference between a small boost in relevancy and a spam looking article.

So after learning what SEO is, make sure you’re not abusing the tactics and just.. get used to¬†sprinkle some here and there.