The Big Bang is a cosmological theory that is considered to be the beginning of the expansion of the universe. According to this theory, the universe is currently expanding, with each point spreading out from a point that was once concentrated in a single point. The Big Bang theory helps us understand how the universe formed and developed. According to this theory, the expansion of the universe continues and this expansion process will continue. This theory plays an important role in understanding the age and structure of the universe and deepens our scientific understanding of how the universe formed and evolved.