1. A computerized method for enhancing keyword expansion for promoting digital content, comprising: accessing a plurality of search engines using at least one input seed keyword, each of the plurality of search engines returns organic results respective of the at least one input seed keyword; for each organic result returned by each of the plurality of search engines, retrieving, using a plurality of keyword suggestion sources, a list of key terms and their scores; merging the list of key terms and their scores from each of the plurality of keyword suggestion sources into a merged list respective of each of the at least one input seed keyword and scores thereof; combining the scores for each of the key terms in the merged list into a single combined score; associating the single combined score with a respective input seed keyword; and reporting the single combined score for each of the key terms for the at least one input seed keyword and the merged list resulting from access of the plurality of search engines and keyword suggestion sources, wherein the merged list contains the keyword expansion.
1. A computerized method for enhancing keyword expansion for promoting digital content, comprising: accessing a plurality of search engines using at least one input seed keyword, each of the plurality of search engines returns organic results respective of the at least one input seed keyword; for each organic result returned by each of the plurality of search engines, retrieving, using a plurality of keyword suggestion sources, a list of key terms and their scores; merging the list of key terms and their scores from each of the plurality of keyword suggestion sources into a merged list respective of each of the at least one input seed keyword and scores thereof; combining the scores for each of the key terms in the merged list into a single combined score; associating the single combined score with a respective input seed keyword; and reporting the single combined score for each of the key terms for the at least one input seed keyword and the merged list resulting from access of the plurality of search engines and keyword suggestion sources, wherein the merged list contains the keyword expansion. 12. The computerized method according to claim 1 , further comprises: combining scores is performed using an optimization method.