Energetic processes such as supernovae explosions and winds from massive stars, collectively called "feedback", can redistribution, ionize, and even remove gas from galaxies. This feedback can open up holes in galaxies, allowing radiation to escape to ionize the ambient gas between galaxies in the Universe, and even shape how galaxies evolve, leaving imprints on the observed correlations between galaxy properties. While often invoked, this feedback poorly understood. With new large spectroscopic surveys and space-based observations, I will probe the origins, mechanisms, and effects of feedback on the evolution of galaxies and the Universe.