Why is "Waiting for Godot" a "Comedy of the Absurd"'?

One of the key figures in the 1950’s, Samuel Beckett
opened the doors for writers and audiences that had never been entered before.  His
play, “Waiting for Godot,” came to be called by Martin Esslen as an “essential example”
of the “Theatre of the Absurd.”  Beckett didn’t acknowledge this, but this style of
writing still became of the most influential theatre movements of the twentieth
century.

These types of plays threw out all conventional
ideas for what drama was up until then. Beckett and the other writers of this genre gave
their plays seemingly no sense of purpose, and that’s what they wanted to show: after
the horrors of all war and its aftermath,  the world was no longer a neatly structured
place, and neither were the Absurdist plays, especially “Godot.”