To put it simply, Touchstone is a clown. One may also call him, as Rosalind does in his first entrance, a "fool." Shakespearean clowns served to provide comic relief in Shakespeare's tragedies, and in his comedies, such as *As You Like It,* they served to set a light, comedic tone. Touchstone does this, like many of Shakespeare's clowns, by engaging in witty exchanges with the "serious" characters with a mock show of wisdom. He does so with puns, such as that in which he mocks a certain knight who swears "by his honor, [though] he never had any..."
He is one of the many "fools" in many of Shakespere plays that had no direct part or participation or central position in the play or does he represent any worldwide view, mortif or any themes regarding to the play itself. His role is to provide some comic relief towards the seriousness of the play with his humor and wit