At the beginning of Waiting for Godot, we find the two protagonists, Estragon and Vladimir, talking beside a country road, by a tree. Estragon proposes that they leave the spot and go elsewhere, but Vladimir says that they can't leave, because they are "waiting for Godot." Thus, from this moment on, the act of waiting is dramatized because we, like the characters, are kept in suspense, looking forward to meeting this mysterious Godot.
Later in the play, Vladimir says that he is "curious to hear what [Godot] has to offer." The act of waiting is thus dramatized further, because we wonder what Godot could possibly have "to offer" that would make Vladimir and Estragon give over so much of their time to simply waiting for his arrival. Our curiosity is stoked when Estragon says that they have asked Godot for a "kind of prayer ... A vague supplication." The precise nature of the "prayer" that they have asked for is kept deliberately vague, so as to more effectively arouse our curiosity.
By the end of the play, the mysterious Godot has still not arrived. Vladimir and Estragon have been told to expect him "tomorrow," but they agree that it is no longer "worthwhile" to continue waiting. However, despite agreeing that they should wait no more, they seem unable to move and unable to stop waiting.
When the curtain falls, Vladimir and Estragon stand still, making no attempt to leave their spot beside the road. This ending dramatizes the act of waiting because it makes the audience wonder why Vladimir and Estragon are unable to stop waiting and so unable to move on. We wonder perhaps if it is actually the waiting itself that gives their lives meaning, rather than the supposed reason for their waiting.