In this lesson, Nick Palazzolo presents an example of materiality in auditing using the case of Mariah, a senior manager at Boulevard CPA firm. She is auditing Mahomes company for the year ended year five and expects a high likelihood of uncorrected and undetected misstatements. The lesson demonstrates the calculation of overall materiality and performance materiality based on firm guidelines, taking into consideration the likelihood of uncorrected and undetected misstatements. The lesson shows the step-by-step process of calculating materiality using given percentages and revenue figures, reinforcing the concept and preparing viewers to handle similar questions if encountered.