Why devotees feed milk to Snakes during Nag Panchami

On the auspicious day of Sawan's First Monday, Devotees worshipping Nag Devata or Snakes as per Hindu Mythology. During Nag Panchami, devotees offer milk to snakes and there is a tradition to feed milk to snakes. But, there is a secret reason behind the tradition and it's revelation will shock you.