https://www.musical-u.com/learn/introduction-to-time-signatures/
The time signature of a piece of music is one of the key clues that can help you understand the rhythm and structure of the piece.
Understand how time signatures work, get acquainted with simple and compound time signatures, hear some famous tunes that illustrate each one, and learn to distinguish time signatures by ear! https://www.musical-u.com/learn/introduction-to-time-signatures/