4.3 - SMS & WhatsApp Marketing for E-commerce (Difficulty: Advanced | Path: Scale)

What is SMS & WhatsApp Marketing?

What is it?

This is a marketing channel where you send messages directly to a customer's phone native text inbox (SMS) or their WhatsApp application. It is a permission-based channel, meaning customers must give you explicit, separate permission (an 'opt-in') to receive these messages.

Why is it important?

It has the highest open and engagement rates of any marketing channel. While email inboxes are crowded, SMS messages are read almost instantly—often with a 98%+ open rate. This makes it incredibly powerful for urgent, high-value messages like flash sales, abandoned cart alerts, and important shipping notifications.

SMS vs. WhatsApp

• SMS (Short Message Service): The classic text message. It's universal, reaches any mobile phone, but is often more expensive and limited to text and links (MMS allows images but costs more).
• WhatsApp: An app-based message. It's often cheaper to send, allows for richer media (images, videos, formatted text, buttons), and is the dominant communication app in many countries outside North America (e.g., Europe, India, Latin America).

⚠️ Common Misconception

You cannot just 'start texting' customers who gave you a phone number for shipping. That is illegal in many countries (like the US, under the TCPA) and will get you heavily fined. Shipping notifications and marketing messages require two separate, explicit opt-ins.