Gamma-Ray Bursts (GRBs) are bright, intense flashes of gamma-rays which can last from a
few milliseconds to several thousand seconds. GRBs have two distinct phases - i) The prompt
emission phase (short lived, emission in gamma-rays), ii) The afterglow phase (long lived, emis-
sion across the electromagnetic spectrum). The study of prompt emission is very important to
addresse a few open questions such as the jet composition, energy dissipation mechanism, particle
acceleration mechanism, and radiation mechanism. In the recent years, the broadband observa-
tions with Fermi has thrown light on the prompt emission spectra in the wide energy range of
150keV to 300 GeV. The prompt emission spectra can be best explained by the band function
which is a result of non-thermal synchrotron and inverse compton (IC) radiative processes from
an optically thin region of GRB fireball. But in some GRBs (e.g GRB 090902B, 090926A and
190114C), it is seen that at early times the thermal component dominates indicating a quasi-
thermal spectral behavior originating from the photosphere of relativistic ejecta. In this talk, I
will highlight some of these efforts, and point towards gaps that still exist in our knowledge as
well as promising directions for the future.