Hamlet approaches the gravedigger and soon learns that it is the grave of a woman.
Hamlet overhears Laertes mention that it is the burial of his sister, Ophelia.
Hamlet reveals himself to the procession to declare his love for Ophelia in the presence of Laertes who is so angry he attacks Hamlet. This develops the character of Hamlet as we begin to feel less sorry for him as we realise that his madness plot pushed Ophelia way too far and was part of her death. This develops the plot because it gave Laertes more reason to avenge his sister and join Claudius in his plot of revenge. The audience is waiting to see how everything turns out. The also developed