What does "close proximity" mean?

Native speaker’s answer
Rebecca
'Close proximity' is a common term used in conversational English, generally stressing that someone or something is very close. 'Close' is an adjective meaning short distance, while 'proximity' is a noun meaning 'nearness in space'. In short, Ellen is just mentioning how close the fans and BTS are next to each other. Ex: I've never been in such close proximity to a superstar. Ex: The dog is in close proximity to its owner.