Answer
The business that is missing in my city is a mall.
Step-by-step explanation:
My city is very small and does not have a mall, despite having enough demand for one of these to be built in the city, as we constantly have to travel to the neighboring city to go to a mall. In this case, if so, the mall would bring benefits because it would move the commerce of my region and would give employment to many people, who would use their wages within the city, moving even more the local money and not the money from the city next door. In addition, it would make the residents happy, since everyone is constantly talking about how good it would be to have a mall in the city.
The advertisement for this mall could be a video posted on instagram and reposted by the city hall, showing the construction of the mall, the structure and the perspective that this type of enterprise would generate.