The search term "online casino" is unequivocal in its reference to Web sites where people can engage in casino style gambling. However, at the time this guide was compiled, the Google search engine returned some 3 1/2 million search results for the search term online casino, and there was little or no difference among the online casinos indexed, representing a total failure of the Google algorithm when it comes to this particular search term. Given the enormous profit potential in online casinos, this failure is to be expected, as any weakness in the Google algorithm can and will be exploited by the best and brightest search engine optimization experts that money can buy. Also worth noting is the questionable legality of online casinos in most jurisdictions, and the fact that most online casinos operate offshore as part of an industry that defies any type of formal regulation.