Although every people have secrets in plain sight which is now a days known as stegnography. This recent growth in computational Power and technology stegnography become today's security technique. Thus embedding hidden content in unremarkable cover media so as not to arrose an eavesdropper suspicion. In this paper I m going to discuss about embedding technique as well as its certain properties like security, robustness and capacity. Moreover through this research article comparison of cover media is also being discussed.