What was the coliseum used for and what happened in there?

The coliseum opened by the emperor Titus in a.d.80 50,000 people could fit in the coliseum. The building was used for a bad purpose like people watch other people get killed and have fight for entertainment gladiators fought each other to death other people even fought animals in the coliseum these games were public shows paid for by emperors and other important Romans to gain popularity.