Microstrip patch antennas are most commonly used in dense, conformal and low- cost wireless applications because of the advantages over the traditional antenna. In this paper, the small introduction of microstrip antenna along with various patch shapes are discussed in detail. Numerous techniques are used to improve the parameters such as bandwidth, return loss, gain, and efficiency of the antenna. In this paper, different feeding techniques such as coaxial cable, line feed, Aperture coupled and proximity coupled feeding techniques along with their advantages and disadvantages are discussed. The formulas used for calculating length and width of patch and ground antennas are provided. The antennas with different slots on patch such as Triangular slot, E shape, Single U shape, Double U shape, fractal techniques are discussed.