We characterized a number of core-collapse supernovae events which has been extensively observed in photometric, spectroscopic and polarimetric modes at optical wavelengths. Our primary goal was to understand various mechanisms involved in the explosion and how they govern observable parameters. We utilized the observational data to constrain progenitor properties, explosion parameters and also to probe circumstellar environment to infer their pre-SN evolution which the progenitor might have undergone. We also probe various peculiarities these SNe exhibits in their observed light curves and spectra. In this talk I shall briefly summarize the key aspects which I investigated in my thesis and shall discuss the scope of further work which I propose to do. Expanding photosphere method (EPM) has been demonstrated to be a reliable distance estimator at extragalactic scale. It would be interesting to extend the work to higher redshift SNe, which would require few epoch of observations during the first month of explosion. Apart from astronomical importance of the estimated distances, it can be used to construct Hubble diagram having a sample of sufficiently high-z SNe. Probing the circumstellar interaction is also a key proposed idea of my future work, which may reveals a wealth of information about the history of pre-SN stellar explosion. As in SNe IIn, where profound interaction occurs between ejecta and extended dense shell of material originated from mass loss of massive WR type progenitors during its stellar life. The study of these interactions give information about the environment and progenitor when the mass loss of the shell happened back in time. Additionally I shall also investigate type IIL or fast declining events to answer some of interesting question which arose from my thesis work. The prevalence of CSM interaction in SNe IIL and its connection with unusual flattening of of HI velocity are also to be examined on more of such events.