can anyone tell me what is best keyword for adsense based site. If possible check my site and let me know what keyword should i use to buy ads
Try how to make money with adsense. Just try mutiple combinations in keyword tool see which ones have less sites listed in google.
There isn't really any one best keyword. If your site's topic is AdSense then naturally keywords related to AdSense would be good. So would keywords related to contextual advertising. You have to spend some time doing keyword research and competitive analysis to really know which are the best phrases to optimize your site for both now and in the future.