As a deli associate, you will be talking to customers at all times, and a broad smile is a good way to start this interaction.
Unfortunately, some customers might be ill-tempered, others might be in a hurry, and consequently, they might mistreat you. Yet, it is always vital to smile! In an article published at Forbes.com, Kaan Turnali says that a smile is crucial for customer service and satisfaction.
Beyond that, according to studies, a smile increases confidence by 10%, which builds trust. Smiling not only shows you are friendly but also improves your mood and attitude.
Check out Ron Gutman TED-Ed video on ‘The Power of Smiling’. You can watch from 4:26 to 5:56.