  We review here the main advances made by using effective field theories
(EFTs) in classical gravity, with notable focus on those unique to the EFTs of
post-Newtonian (PN) gravity. We then proceed to overview the various prospects
of using field theory to study the real-world gravitational wave (GW) data, as
well as to ameliorate our fundamental understanding of gravity at all scales,
by going from the EFTs of PN gravity to modern advances in scattering
amplitudes, including computational techniques and intriguing duality relations
between gauge and gravity theories.
