Answer:
Feedback.
Step-by-step explanation:
In this scenario, a coffee shop uses an online system to engage customers. After each transaction, customers receive a text asking them to rate their experience with either a smiley, neutral, or sad face emoji. This practice is an example of feedback control.
Feedback can be defined as the information acquired from customers or consumers about their reactions to a particular product bought or service taken. Business firms or entities use informations gathered through feedback to improve on the quality of their products or services being provided to consumers and to measure sales performance.