The Universe was once in a very low probability state. Entropy growing is that phenomenon of it evolving into the most likely possible state at each time, leading into the most probable state of them all.
That explanation uses some weird definition of "time" that depends on stuff happening, not on that thing we keep going through independently of what we are doing. But it's a valid definition, it's just not usual.
That explanation uses some weird definition of "time" that depends on stuff happening, not on that thing we keep going through independently of what we are doing. But it's a valid definition, it's just not usual.