Search engines usually collect different information from users. They display some of the information to users while most of the information is not revealed to them. Still recently Yahoo displayed some of such interesting information to the users. This is known as Search category Commercialization Index by Yahoo. Yahoo uses various methods for this. They measure the number of searches made under a category. They usually calculate the number of searches that have been made since the creation of that particular category. Another method to do this is the calculation of the searches that have occurred during a particular period of time. Another metrics is the coverage under a particular category. The total number of advertisers in a category will also be useful information for Yahoo in making this index possible. The average click through rate for the different advertisers is also calculated for a category. The life time value of the searcher and the average price per click are also considered while making measurements. This is highly helpful when you want to give information to advertisers regarding the number of people interacting with ads. It also provides detailed information on which all categories of searches provide the best advertising opportunities. There is actual information sharing with the advertisers taking place here.
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