Proton-proton collisions are a type of high-energy particle collision that occurs in particle accelerators such as the Large Hadron Collider (LHC) at CERN. In these collisions, protons are accelerated to very high speeds and collide with each other, releasing a huge amount of energy in the process. Scientists study these collisions to understand the fundamental properties of particles and forces in the universe, as well as to search for new particles or exotic phenomena that could provide insights into the nature of the universe. Proton-proton collisions are an important tool in high-energy physics research and have led to groundbreaking discoveries such as the Higgs boson.