What is theater?
Theater : a building where theatrical performances or motion-picture shows can be presented; "the house was full".
How do you think theater, as a media form, communicates messages to its audience?
Let me start from old days (stone age) have you ever think about it , during those times without languages and technology how human communicated with each other ? Gesture, yea you’re rightGesture was one of the base communication form during that time after it was painting then they create languages for themselves ,so let’s back to gestures ; theaters are same like gesture languages but they use music and some decoration environments which that’s helps them to send their messages to audience.
Or in other word:
“Music blows lyrics up very quickly, and suddenly they become more than art. They become pompous and they become self-conscious ... I firmly believe that lyrics have to breathe and give the audience's ear a chance to understand what's going on. Particularly in the theater, where you not only have the music, but you've got costume, story, acting, orchestra. There's a lot to take in.”― Stephen Sondheim
So theaters unlike other form of media can send their messages indirectly to the audience which is the beauty of it. For example in theater the actors/actress , can performing about politics but the show can be about animals in forest and how they influence each other in that environment which as we know before many of these performances performing their artistic works.
I want to mention this during world war II one of the most powerful weapons (which used by governments ((allied and axis)) ) was theaters and street shows which they use it to inject their will to the people if you want to understand this part better I recommended read “hypodermic needle theory or magic bullet “ it will helps you to understand most of the purpose of media around you be always consider this as Marshall McLuhan said “medium is message” which can’t be miss used by other parties and also review my article which you can find it in my weblog “ http://ashkan-alidi.blogspot.com/ “About how media can be used as propaganda weapons for other parties .