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. It tells you how the music is to be counted, what beats are emphasized, and most importantly, what the “feel” of the music is likely to sound like.
In this introduction to time signatures, we’ll teach you exactly what those fraction-like numbers mean, what kinds of music use what time signatures, and the simple time signature that almost all of your favourite rock and pop jams use.
https://www.musical-u.com/learn/introduction-to-time-signatures/