  The swampland is the set of seemingly consistent low-energy effective field
theories that cannot be consistently coupled to quantum gravity. In this review
we cover some of the conjectural properties that effective theories should
possess in order not to fall in the swampland, and we give an overview of their
main applications to particle physics. The latter include predictions on
neutrino masses, bounds on the cosmological constant, the electroweak and QCD
scales, the photon mass, the Higgs potential and some insights about
supersymmetry.
