I believe one of the most common (and extremely harmful) SEO mistakes many small businesses and site owners make is ignoring what most sites have as the natural anchor text distribution formula. From my own experience, as well as SEOmoz’s research, people that follow the anchor text distribution formula (shown below) successfully get into the Top 10 on Google and were progressing in the SERPs even after the Penguin update. Those that ignored this rule failed to get high rankings. When I deal with small companies that have hired a cheap SEO firm, that firm has usually built a lot of backlinks with the exact same anchor text.
Below I will show you 6 reports – 3 natural Anchor text distributions and 3 non-natural Anchor text distributions.