New technological improvement has made the way very easy to reach their potential client by new and innovative ways. Advertising is the main weapon for it and if the business is related to online then Behavior targeted Advertising is the main thing. Online publishers and advertiser use the new technique of Behavior targeted advertising to increase the effectiveness of their campaigns. Behavioral advertisement uses the collective information on individuals web browsing behavior. It helps to deliver the online advertisements to the users who are really interested. It helps to the site owners or ad networks to display the most relevant content in the ads. The early technology was confined in only traditional Ecommerce but now the entire advertisement theory is changed and it is more psychologically and strategically enhanced.