Abstract: Inequalities have existed in different branches of Mathematics since time long. In 1934, the first book Inequalities was written by G. H. Hardy, J. Littlewood and J. Polya. The second book on this topic was written by E. Bechanbach and R.Bellman in 1961. These books have revolutionized the field of inequalities into a well organized field and provide motivations, ideas, techniques and applications for new research. One such salient inequality is Numerical radius inequality.