Explore the second lecture on Hadron Structure in Experiments delivered by Sanghwa Park as part of the International School and Workshop on Probing Hadron Structure at the Electron-Ion Collider. Delve into advanced topics related to the internal structure of protons and neutrons, focusing on experimental approaches to studying quarks and gluons. Learn about cutting-edge techniques used to investigate key questions in particle physics, including quark and gluon distribution within nucleons, the origin of proton mass and spin, and the potential for gluon saturation in heavy ion collisions. Gain insights into the upcoming Electron-Ion Collider at Brookhaven National Lab and its potential to revolutionize our understanding of hadron structure through high-luminosity experiments and wide kinematical coverage.