The present invention provides a method and a system for providing targeted advertisements to a user. The method includes determining a set of signals corresponding to at least one online activity associated with the user and then analyzing the set of signals to identify one or more user interests. The set of signals includes at least one of a share signal, a view signal, a search signal, and a click signal. Further, the method includes tagging the user with at least one ad exchange cookie based on the identified user interests and an available advertisement pool. Lastly, the method includes displaying, by an advertisement network, an advertisement to the user based on the ad exchange cookie.