53. A method of optimizing searching as in claim 52 using website content from the search results to allow the control group to grow if a substantial amount of commonly occurring keywords have been identified further includes: determining a SIC business activities category in the SIC predefined taxonomy having a highest ranking match of commonly occurring keywords; and enabling the category having the highest ranking match to grow if a large group of search results are assigned to the category.
52. A method of optimizing searching as in claim 51 wherein grouping the search results based on the commonly occurring keywords identified further includes: identifying keyword or phrase matches in website content associated with the search results and website content associated with the business entities in the control group; ranking the matches associated with each category of business entities in the control group.