The horizontal in-plane shear interaction between the profiled cold-formed steel decking and concrete over is the prime factor that determines the strength of a composite concrete-steel deck slab. The control of slippage between concrete and steel is the most vital part to curb the central deflection. The means to reduce the slippage thereby to improve the shear interaction includes the provision of shear studs, ribs, embossments and other means. In this paper, the study on presence of embossments in steel sheeting and the effect of various parameters such as size, shape such as rectangular, square and circular, and the alignment of embossments, in the shear capacity and ultimate strength of the composite slab using three-dimensional computational finite element modeling is presented. It is found that change in shape, size and alignment of embossments is affected in the shear resistance of the composite slab. © Published under licence by IOP Publishing Ltd.