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Hi Rais, Google are, or plan to, penalise sites that are heavy on ads. Some SEOs believe this was part of the Panda algorithm update and others believe it is or will be part of a separate algorithm. For example, Matt Cutts has said: "If you have ads obscuring your content, you might want to think about it. Do they see content or something else that’s distracting or annoying?" Advice on the Official Google Webmaster blog reads: "Does this article have an excessive amount of ads that distract from or interfere with the main content?" ... just something you might want to consider. Good luck.