Demonetization in India involves removing high denomination currency notes, first announced by PM Narendra Modi on November 8, 2016, aimed at combatting black money, fraud, and corruption. The initiative included restrictions on cash withdrawals, allowed certain exceptions for events like weddings, and primarily targeted the reduction of cash circulation in the economy while promoting digital transactions. Despite its intended benefits, the move led to significant challenges including cash shortages, impacting various sectors and causing hardships for the public.