Oxygen is vitally important for life on planet Earth. You aren’t the sole living organism who breathes it, and the majority of living organisms living on planet Earth breath it in order to live.
Oxygen holds the atomic number 8 (eight Protons are found in the nucleus of its atom). At standard temperature and pressure we know this outstanding chemical element in the form of gas with two atoms O2.
Watch the fun animation video for an account of how Oxygen interacts with other chemical elements on Earth.