Play-within-the Play: As the name suggests, a play-within-the -play is a play that is created in another play. Usually it is a complete play with a beginning, middle and an end. It has its own theme which in many cases is related to the theme of the main play. It is created for a particular purpose. A very good example of the play-within the-play is The Mousetrap in Hamlet. Shakespeare uses the technique to confirm the claim made by the ghost.
Course material, Research Work from chapter 1- 5, Publishing, News, Entertainment, Sport, School Gist.