We use adverbs like very/really/quite with adjectives to show a strong degree.
It was very cold yesterday.
Chris is really angry. What happened?
I’m quite tired today. I didn’t sleep well last night.
When we want to show a strong degree with comparisons (bigger, more interesting etc.) we need to use the adverb MUCH
Imported apples are much more expensive than local ones.
Kathy is very/really/quite tall.
She is much taller than her husband.