What is theater

Theatre (sometimes theater in American English) is a collaborative form of fine art that uses live performers to present the experience of a real or imagined event before a live audience in a specific place. The performers may communicate this experience to the audience through combinations of gesture, speech, song, music or dance. Elements of design and stagecraft are used to enhance the physicality, presence and immediacy of the experience. The specific place of the performance is also named by the word "theatre" as derived from the Ancient Greek θέατρον (théatron, “a place for viewing”) and θεάομαι (theáomai, “to see", "to watch", "to observe”).

Modern Western theatre derives in large measure from ancient Greek drama, from which it borrows technical terminology, classification into genres, and many of its themes, stock characters, and plot elements. Theatre scholar Patrice Pavis defines theatricality, theatrical language, stage writing, and thes pecificity of theatre as synonymous expressions that differentiate theatre from the other performing arts, literature, and the arts in general.

Theatre today includes performances of plays and musicals. Although it can be defined broadly to include opera and ballet, those art forms are outside the scope of this article

Source : Wikipedia

In my opinion, theatre has a unique way to communicate it messages to its audience because it deliver its messages live and spontaneous manner to the audiences and that what makes it interesting in first place. Although most of it is already written in script but if they screw up, they do cover it spontaneously as well. Theatre deliver its messages through the acting of the performers, through the gestures, words, props and whatever it is on the stage during the play. Some of the audiences pay for the play they watch, some of them just there to enjoy the play they pay to make their time worthwhile but one thing for sure, theatre has its own charm and charisma to attract and has a fan base because the experience watching a live acting is irreplaceable.

Other art similar to theater

-Live sport match

-Live television broadcast

-Concert

These example I've given, it is not similar as watching a recorded events and live event. The audiences must at the location of the event themselves to be able feel the tension, the atmosphere of an event