  In this work we highlight an important perspective for the complete
understanding of the stochastic gravitational background structure. The
stochastic gravitational wave background is perhaps the most important current
and future tool towards pinpointing the early Universe phenomenology related
with the inflationary era and the subsequent reheating era. Many mysteries are
inherent to the stochastic spectrum so in this work we highlight the fact that
the complete understanding of early Universe physics and of astrophysical
processes requires data from many distinct frequency band ranges. The
combination of these data will provide a deeper and better understanding of the
physics that forms the stochastic gravitational wave background, in both cases
that it is of cosmological or astrophysical origin. We also discuss how the
reheating temperature may be determined by combining multi-band frequency data
from gravitational wave experiments and we also discuss how the shape of the
gravitational wave energy spectrum can help us better understand the physical
processes that formed it.
