QR Code: Generate a QR code for your WhatsApp chat link and display it in your store, on packaging, or in print ads.
Facebook/Instagram Ads that Click to WhatsApp: Run ads on Meta platforms where the call-to-action button directly opens a WhatsApp chat with your business. Once a user sends you a message, you have an open conversation.
Leverage Broadcast Lists (with limitations): As mentioned above, you can use Broadcast Lists to send messages, but only to those customers who have saved your business's number in their phone. Focus on providing value so they want to save your number.
2. Using the WhatsApp Business API (for medium to large businesses)
The API allows for large-scale messaging and automation, but with the strictest opt-in rules. You need to work with a WhatsApp Business Solution Provider (BSP) to use the API.
Explicit Opt-in is MANDATORY: This is the most crucial step. You must clearly obtain a user's permission to send them messages on WhatsApp. This opt-in must be:
Clear: State what kind of whatsapp number list messages they will receive (e.g., "Receive order updates," "Get promotional offers").
Explicit: Require an affirmative action (e.g., checking a box, typing "YES," clicking a button).
Verifiable: You must be able to prove consent if requested by WhatsApp.
Common Opt-in Channels:
Website forms: A checkbox during checkout, newsletter signup, or contact form.
SMS: A user sends an SMS to your number, indicating consent.
In-store: Signage with a QR code or instructions to text a number to opt-in.