What exactly was the “wall of sound” technique and why was it so important for music?

Question

I read the wikipedia page on it and im still confused on how it is made and what exactly was so good about it. Im not familiar with music production but ive seen people mention Spector and how he contributed to music and the “wall of sound” is always something i see people mention. But i never know what exactly that is

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Answer 1

In short, it’s reverb.

There was more to it than that, but the most unique aspect of production that Spector developed was reverb.

He would record a song. Then play it back in a tiny, tiny room filled with speakers. He would record what that room sounded like. And use that track recorded in the tiny room for the Final Product. The room was an echo chamber that gave reverb to his music.

I have also been frustrated, researching this term, by seeming non-answers that lurk in jargon. This was the explanation which helped me understand