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I give a brief overview of experimental studies of the spectrum and thestructure of the excited states of the nucleon and what we learn about theirinternal structure. The focus is on the effort to obtain a more completepicture of the light-quark baryon excitation spectrum employing electromagneticbeams, and on the study of the transition form factors and helicity amplitudesand their dependence on the magnitude of the photon virtuality $Q^2$,especially for some of the most prominent resonances. The results were obtainedin pion and eta electroproduction experiments off proton targets. Theystrengthen the connection of experiment and new results from modeling sQCD inDSE and Light Cone SR approaches. They also point to the nature of these statesas 3-quark excitations at the core.

N* Experiments and their Impact on Strong QCD Physics