When considering energies below 1GeV (corresponding to the scale of spontaneous chiral symmetry breaking), perturbative QCD breaks down, because the strong coupling constant becomes too large. Therefore other theoretical approaches need to be found to describe processes in this energy range, e.g. Chiral Perturbation Theory (ChPT). I will introduce you to this theory's underlying symmetries and applications and explain how it can be used to make predictions about experimental results yet to come.