SEOmoz.org member StuPrice analyzes the keyword "Viagra" to see how the word, one of the most spammed in the English language, has managed to rank No. 2 in Google and Yahoo search queries for the past
two-plus weeks. He looks at the domain medical/technical name for the active ingredient in Viagra and identifies a black-hat tactic that has more than 8,000 links from reputable sites linking to it.
Along with the "invisible" links, the age of the site and the number of pages Google has indexed helps to boost the site in the SERP ranking. Citing Wordtracker numbers, StuPrice
estimates 4,067 people search on "Viagra" each day. The No. 2 position in the SERP ranking receives about 12% of the click-through rates, according to AOL data.
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