One might think that they could simply as a few people who run AdSense campaigns and get a good idea of what keywords pay how much. However, Google's terms and conditions for AdSense prohibit any person from sharing their earnings information with anyone else. Therefore, you are not going to find people readily to give you the keywords that pay them well. Besides, they don't want more and more people using that keyword and cutting their income, either.

This may sound as if you are being left in the dark, and to some extent you truly are. But, you can use some good common sense and make a good guestimate of which keywords are likely to pay well.

One way to select keywords that are profitable is to research keywords using a keyword tool like Word Tracker. Look for keywords that are niche keywords, having very few competitors and numerous searches performed. These will likely pay rather well. Start out by trying a few of these and finding out which ones pay best, keeping those and dropping the