Mumbai: Havas Media Tribes, the partnership between Havas Media Group India and Tribes Group, has rolled out a high decibel out-of-home (OOH) campaign for Swiggy Instamart. The multi-city, extensive OOH campaign includes ‘Asia’s biggest billboard’ at Bandra Western Express Highway (ROB) Mumbai, said the statement. With this, Swiggy Instamart, a long-standing client of the