Stage effects are techniques used in theater, concerts, and other live performances to enhance the visual and auditory experience for the audience. These effects can include lighting changes, smoke or fog machines, and sound effects that create atmosphere or emphasize certain moments in a performance. Additionally, stage effects can involve the use of props, backdrops, and special equipment like pyrotechnics or holograms. These elements work together to create a more immersive experience, helping to tell the story and engage the audience in a memorable way.