The Shankh is considered to be a very sacred symbol and is referenced in all the ancient literature of India.
According to science, the blowing of a conch shell enhances the positive psychological vibrations such as courage, determination, hope, optimism, willpower, etc. in the blower as well as those around him.
The conch keeps away evil spirits and saves one from calamities. The water from the Shankha purifies the sinner and can cure all the ailments which cannot be cured by the other medicines. It is a cure for the physical ailments in humans, from the the fear of death and gives liberation from the eternal cycle of birth and death.