Why do people stay awake on the night of Sharad Purnima and worship Goddess Lakshmi?

According to Hindu beliefs, Goddess Lakshmi visits Earth on the night of Sharad Purnima and asks, "Ko Jagarti? (Who is awake?)" and showers her divine grace on those awake and in prayer. Hence, devotees, especially in Bengal and eastern India, observe it as Kojagari Lakshmi Puja and stay awake the whole night, worshipping the Goddess of wealth and prosperity.