General Public
noun, の adjective
A big populous place sounds like a place with a lot of people but it's more like a big part of the populace. It's most of the populace, sure, making it the general public.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
もっと大衆の声に耳をかたむけてください。
Please listen closely to the voice of the general public.
巨大地震で大衆はパニックにおちいった。
Due to the massive earthquake, the crowds were panicked.
大衆の感じ方次第です。
It depends on how the masses feel.