WhatsApp Promotion is an ad format that shows banner, video, or text ads to users. It offers two options: Direct WhatsApp Promotion, where ads (images, videos, or text) are sent to individual users after they book a metro ticket and receive confirmation, and Mass WhatsApp Promotion, where brand messages (videos, images, or text) are sent to all users who have previously booked tickets through the metro’s official WhatsApp account. Brands can also use hyper-targeting to customize ads based on specific user criteria, making promotions more relevant.