Working with extensive-tail keywords (distinct phrases that searchers use) that can help information get to its target market???? ?????? ?????????? ??? ????? ???? ?? ??? ?????? ??? ??????. ????????? ?????????? ??????? ????? ??????, ??????????? ?? ??? ??????? ????? ????????? ???? ????? ??? ????? ??? ??? ??? ?????????? ??? ???? ???????????.This lesso