Sometimes the phrase is a little bit abstract, 有些片語是抽象的 you can think 生意上門 is actually the customer coming to you for business 妳可以想像生意上門就是客人來跟妳做生意啦～ 而漸漸有生意上門,more and more customer coming to you, that is a definitely good thing. And you will say, Wow,漸漸有生意上門了, it's wonderful.

有(have) 生意(比喻customer) 上門(上=腳上抬跨進來，門=door，上門=come to pass your door) 了(modal particle)

이거는 "손님을 점점 많이졌다" 이라고 생각하세요.

是个非常口语话的表达，这句话的意思是：太好了，渐渐地生意好了起来。 有利润可赚的意思。