Using various embodiment, methods and systems to implement an objective based advertisement placement platform are described. In one embodiment, a method and system to display advertisements in three dimensional (3D) online environment based on an objective of an advertiser is disclosed. A computing device receives the objective of the advertiser. In one embodiment, the advertiser objective includes determining when to stop displaying a branded smart object (BSO) to a user in the 3D online environment, the objective including an engagement rule. The computing device can further determine whether the advertiser's objective has been achieved by a user, the determining including evaluating a user engagement score (UES) and comparing the UES with an advertiser's engagement rule. If the advertiser's objective is achieved (or met) by the user, the BSO is not displayed to the user for a predetermined period of time.