The light pseudoscalar mesons are a powerful tool to investigate the Effective Field Theories that describe the strong interactions at low energies where the perturbative QCD is not applicable.
Recent results on pi0 and eta mesons are reviewed. The eta->3pi decay and the extraction of fundamental parameters like the masses of the light quarks is described.
The measuremens of the Transition Form Factors in gamma-gamma processes and in Dalitz decays are compared with some theoretical predictions.
Finally the search for Dark Photons in decays involving pi0 and eta is discussed.