Understanding how to effectively classify the brand and commercial anchor text is crucial in order to have an excellent unnatural link detection classification. Watch the video in order to learn how to do it best.
Other useful articles:
http://cognitiveseo.com/blog/2522/brand-anchor-text-vs-commercial-anchor-text-ratio/
http://cognitiveseo.com/blog/1414/anchor-text-distribution-payday-loans/
http://cognitiveseo.com/blog/1398/varied-anchor-text-rank-targeted-keyword-phrases/
http://cognitiveseo.com/blog/1385/backlink-analysis-tool-link-analyzer-intelligence/#4