Why does Goffman believe that the nature of our actions in social settings is a “performance,” and how does this relate to an individual’s role within a certain area of society?

When considering a group of performers acting together toward a collective end, what problems may arise within the group, and how does the group resolve those issues while maintaining a favorable impression in the eyes of its observers?

What does Goffman mean by “region,” and why does he think it is necessary to divide regions into a “front” half and a “back” half?