Various aspects of the supercurrent diode effect have been explored in different materials along different directions since its discovery in 2020 [4] and it has been the central theme of multiple studies published during the time of writing this thesis [9,115,116,126,127]. Though a lot of emphasis has been on improving the efficiency of the diode effect and creating diode effect without an external magnetic field, the diode effect can be used to study the properties of the material or the Josephson junction as in this thesis. As mentioned earlier, the inversion and time reversal symmetry breaking criteria required for the existence of a supercurrent diode effect is quite interesting as it also the condition required for many forms of unconventional superconductivity. This makes the diode effect a powerful and useful tool to investigate novel superconducting phases, which are hard to probe by other experimental methods. For example, a time-reversal symmetry breaking chiral superconducting state has been reported in Sr2RuO4 junctions [147] through the appearance of spontaneous chaotic diode effect in the absence of an external magnetic field due to the varying chiral domain distribution during each cool down. Though a spontaneous diode effect was observed in the same system almost 20 years prior [148], it was not analyzed from a time-reversal symmetry breaking perspective and was attributed to an anomalous Josephson behavior. Meanwhile a universal Josephson diode effect based on the Meissner screening currents in short lateral Josephson junctions independent of the characteristics of the junction material has also been proposed [106]. This chapter summarizes all the results obtained in this thesis and results obtained on Josephson diode effect in other systems during the period of the study. This chapter also discusses the open questions and future experiments that can provide an improved understanding of Josephson diode effect.