WhatsApp Marketing is a digital strategy where businesses communicate with customers through WhatsApp, leveraging rich media such as images, videos, and interactive features to engage users in two-way conversations. It is cost-effective, uses internet connectivity, and offers detailed analytics, making it suitable for personalized and multimedia-rich campaigns targeted at over 2 billion users worldwide.

SMS Marketing, by contrast, uses traditional text messaging to reach any mobile phone without needing internet or a smartphone. It is typically used for time-sensitive alerts, promotions, and reminders with basic personalization and limited media (mostly text). SMS has wide reach but lower engagement compared to WhatsApp.

In summary, WhatsApp Marketing excels in interactive, media-rich communication appealing mostly to smartphone users connected to the internet, while SMS Marketing is broader in reach but simpler, ideal for direct, quick messages to any mobile user. Many businesses use both complementarily to maximize engagement and coverage.