It is a colourless gas that is composed of three atoms of oxygen .
Ozone is of two types, that is good ozone and bad ozone.
Good ozone:
Good ozone is also called stratospheric ozone which means good ozone is present in the upper atmosphere which is the stratosphere.
When ozone is present in the stratosphere region, then it forms a protective layer that protects us from the harmful ultraviolet radiation which comes from the sun.
Bad ozone:
Bad ozone is present on the Earth’s surface and it damages human health, vegetation, etc.