Metro rail networks have become the backbone of urban transportation in India. Every day, millions of commuters travel through metro stations and trains across cities such as Delhi, Noida, Gurugram, Bengaluru, Mumbai, Hyderabad, Chennai, Kochi, Lucknow, Jaipur, Ahmedabad, Pune, and Nagpur. This massive daily footfall makes metro advertising one of the most effective Out-of-Home (OOH) advertising platforms for businesses looking to increase brand visibility and reach urban consumers. Unlike traditional billboards or newspaper advertisements, metro advertising offers repeated exposure to commuters who spend time waiting on platforms, purchasing tickets, walking through stations, and traveling inside trains. This extended dwell time significantly improves brand recall and engagement.