14. The machine-implemented method of claim 1 further comprising: for each of the at least two sets of keyword suggestions, and for each new normalized score for each of the keyword suggestions of the heterogeneous set of keyword suggestions, adjusting the new normalized score to generate an adjusted new score so that a sum of the adjusted new score for each of the sets equals one.
14. The machine-implemented method of claim 1 further comprising: for each of the at least two sets of keyword suggestions, and for each new normalized score for each of the keyword suggestions of the heterogeneous set of keyword suggestions, adjusting the new normalized score to generate an adjusted new score so that a sum of the adjusted new score for each of the sets equals one. 15. The machine-implemented method of claim 14 wherein the act of adjusting the new normalized score includes multiplying the new normalized score by: 1 + 1 2 + … + 1 n . where n is the number of targeting keyword suggestions in the heterogeneous set of keyword suggestions.