WhatsApp Broadcast Messages for Bangladesh Businesses: Rules & Best Practices

A WhatsApp broadcast — a new product drop, an Eid offer, a restock alert — can drive a wave of sales in minutes. But blast it the wrong way and you get reported, rate-limited, or banned. Here is how to broadcast safely on the official WhatsApp Business platform.

Understand the 24-hour window

WhatsApp splits messages into two kinds. Inside 24 hours of a customer’s last message to you, you can send free-form replies. Outside that window, you can only send pre-approved template messages. This is the single most important rule for broadcasting — sending free-form promotions to cold contacts is what gets businesses blocked.

Use approved template messages for promotions

• Write your promo as a template and submit it to Meta for approval.
• Only message people who opted in — customers who have bought or messaged you before.
• Personalise with name and relevant details; avoid spammy all-caps and excessive links.
• Give an easy way to opt out — it protects your number’s quality rating.

Protect your number’s quality rating

Meta scores your number on how customers react. Too many blocks or "not interested" reports lowers your quality rating and your daily messaging limit. Send relevant messages to people who want them, and your limit grows over time instead of shrinking.

A small list of opted-in customers who love you beats a huge list of strangers who report you. Quality over volume keeps your number alive.

Best practices that actually convert

1. Segment: send the right offer to the right group (past buyers, new leads, inactive customers).
2. Time it: send during local active hours, not midnight.
3. Lead with value: a real discount or genuinely useful update, not just "buy now".
4. Follow up automatically with a drip sequence to people who showed interest.