Worshipping Lord Ganesha and Goddess Lakshmi during Diwali is a common practice in Hindu culture. Here are a few reasons why people worship the idols of Lord Ganesha and Goddess Lakshmi during Diwali:

Lord Ganesha: Ganesha is known as the remover of obstacles or Vighnaharta. Worshipping Lord Ganesha at the beginning of any auspicious occasion is believed to bring good luck and success. It is believed that worshipping him before worshipping Goddess Lakshmi ensures that all obstacles are removed and the blessings of Goddess Lakshmi are received without any hindrance.

Goddess Lakshmi: Lakshmi is the Hindu goddess of wealth, prosperity, and abundance. She symbolizes good fortune, spiritual and material prosperity, and success in all endeavors. Worshipping Goddess Lakshmi during Diwali is believed to invite her blessings into one's home and life, bringing wealth, prosperity, and abundance.

Worshipping a metal idol of Lord Ganesha and Goddess Lakshmi is common during Diwali as it is a tradition to bring auspiciousness into the household. Metal idols are durable and can be used for multiple years. Many people also consider metal idols as a symbol of purity and divine energy.