A shiny silver mirror ball, also called disco ball. This is a new emoji belongs to Emoji 14.0 which released in September 2021.
🪩 generally means disco ball. It usually appears in nightclubs
💃 and is used for creating a lively atmosphere, so 🪩 can be used in topics related to night club, clubbing, live house, party
🥳 or dancing. It also can be used with emojis
🎧,
💿 or
📀 to indicate DJ(Disc Jockey). Related emojis:
🤘🎤🎸🕺