Why does spacex use helium?

SpaceX uses helium for various critical functions in its space missions. Helium is utilized in the pressurization systems of SpaceX's rockets and spacecraft, ensuring the proper functioning of propulsion and life support systems. Additionally, helium aids in the purging of fuel tanks and lines, preventing contaminants from entering and potentially causing failures. Its unique properties, such as being lightweight and inert, make helium an ideal choice for these applications, contributing to the safety and success of SpaceX missions.