Answer:
Viral marketing
Explanation:
From the explanation of the scenario highlighted in the question, it is clear that Uptown - clean crew is using viral marketing to make its services known to potential customers and generates more sales.
Viral marketing is a marketing strategy in which customers are encourage to share information about the product and services of a firm through the use of internet. It is a techniques that uses the spread of messages (by users of the product ) to generate interest of potential customers thereby leading to a potential increase in sales.
