You will agree with me that not all adsense ads are created the same.Some ads generate more revenue for every click that is made on the websites where it is displayed.The reason is that not all niche markets have high paying keywords.Only high paying keywords niche market will have advertisers bidding high on those keywords. To get high revenue from clicks made on your site you should target high paying niche markets.There are many ways of determining if a market has a high paying keywords potentials.When you have decide on a niche market you want to target,go to spyfu.com and type your keyword there.You will get the lowest to the highest bids advertisers are willing to pay for that niche market.You can equally use the tool at overture. Once you have determined the amount advertisers are paying for that niche market,you are now set for the next stage of selecting low competitive keywords with high demands.You can use the keywords suggestion tool at seobook.com for this purpose.With this tool you get different variations of the keywords of the niche market you are targeting. Targeting high paying niche markets and by optimising your site effectively in line with Google friendly website design,you are sure to increase you Google ads revenue.