Someone is already searching for what you do
Every day people in the UAE type "car garage in Al Quoz", "AC repair Mussafah", "German car specialist Dubai" into Google. They are not browsing. They have a car with something wrong with it and they are working out who to trust with it.
Most of them never find you. If your workshop has no website — and about half do not — that search ends at whoever paid for the ad.
Your listing is what puts you in front of them. It sits on the page for your area and on the page for every job you do, next to the other workshops nearby, with your name and your number on it.