The Globe Theatre vs Modern TheatresThe Globe Theatre was very different from modern theatres. It was an open-air theatre, so it did not have a roof over the main auditorium. The audience sat in the balcony / circle or mezzanine, while poorer spectators stood in the orchestra, also called the yard.
The stage was also very different. The Globe had a large stage that extended into the audience, so the actors were surrounded by spectators. There were wings, but there was no modern backstage area like in most theatres today. The Globe also had very simple scenery / sets. Instead of changing large sets, Shakespeare's actors often used words and props to show where the action was happening.
Another important difference is the curtain. Modern theatres usually have a curtain / drop curtain that separates the stage from the house. At the Globe, there was no large curtain like the ones we see in modern theatres. The actors entered and left through the backstage area and the wings.
Modern theatres usually have comfortable seats, a roof, sophisticated lighting and sound systems, and elaborate scenery / sets. They also often have clearly separated areas for the audience and the performers. At the Globe, the audience was much closer to the actors, and the atmosphere was more interactive.
So, the main difference is that the Globe was open, simple and interactive, while modern theatres are generally more comfortable, technologically advanced and separated from the audience.