Proton-proton collision is a research area in particle physics that involves studying the interactions between protons at high energies. These collisions are typically studied at particle accelerators such as the Large Hadron Collider (LHC) at CERN. By colliding protons at very high energies, scientists can study the fundamental particles and forces that make up the universe. Proton-proton collisions are used to search for new particles, study the properties of known particles, and test the predictions of theoretical models such as the Standard Model of particle physics. This research area is crucial for understanding the fundamental building blocks of the universe and the forces that govern their interactions.