Ozone Screen or Ozone Layer?

The term “ozone layer” is often referred by people as a covering of ozone surrounding Earth but the term does not have a functional meaning to it as people may not necessarily know it actually serves the purpose of protecting the earth from harmful radiation. But apart from the function, what is the mechanism behind it’s protective “screening” ability?

Ozone can absorb highly energetic and harmful UV-B and UV-C light and hence break into oxygen atom and oxygen molecule, effectively absorbing the harmful radiation. The oxygen atom reacts with oxygen molecule to form ozone again making it ready to absorb UV radiation again, hence the cycle repeats it self.