For all of you who has played with adsense or adwords and or other promotional things. Have you experience with some keywords tools which can give us child keywords with a range number of competition, trends, and CPC, each time we generate ? I know there are Google Keywords Tools. But i guess its expensive to purchase their API services. So i have choose Semrush and about 7 month i have no problem at all. I just need to know whats your experience. Please let me know while you have recomendation for such services. Thank you.