If you sell online through Facebook, Instagram, or LINE OA, you have probably heard "broadcast" often — especially when you want to push a promotion to past customers or announce new products to people who have already messaged your shop. This article explains plainly what broadcast messaging is, how it differs from a regular post, and when a shop should use it.
What is broadcast messaging?
Broadcast messaging means sending the same message to many customers at once through chat or inbox channels — for example Facebook Page Messenger, Instagram direct messages, or LINE OA messages. The main goal is to reach people who already have a relationship with your shop directly, without waiting for social algorithms to show a feed post.
How is it different from a page post?
- Page posts — customers must see your feed on their own; organic reach tends to decline over time.
- Broadcast — the message goes to the inbox; customers see it in chat, so open rates are often higher than feed posts.
- Broadcast — works well for time-limited promotions, low-stock alerts, or bringing past customers back to buy again.
What can shops do with broadcast?
- Announce promotions, discounts, or short flash sales to past customers.
- Introduce new products to people who asked or bought before.
- Send payment links or cart links.
- Invite customers to message back before items sell out.
- Send product photos or content you want seen clearly.
Which platforms do Thai shops use most?
Thai social-commerce shops commonly broadcast on Facebook (messages from the page), Instagram (direct messages to followers or selected audiences), and LINE OA (messages to customers who added the account). Each platform has different rules, limits, and reachable audiences. For Instagram DM-style broadcast specifically, ChatMango is the first and only solution in Thailand that supports it fully through a browser extension built for shops.
What to know before you start
- Content should be useful — clear offers, readable images, and working links.
- Watch frequency — sending too often may lead to blocks or unfollows.
- Measure after sending — track replies, orders, and link clicks.
Instagram: message types to use vs avoid
IG broadcast can reach followers, likers, commenters, or past customers who messaged you — pick the segment per campaign and write clear, useful copy. What to avoid is spammy or deceptive content, not messaging these customer groups.
Messages that usually work
- Promotions, new products, flash sales — clear price, discount, and time window.
- Low-stock or new-arrival alerts to followers and past customers.
- Follow-ups on comment questions — price, size, color, stock.
- Win-back messages to people who messaged or ordered before.
- Payment links, product details, order or shipping updates.
Messages to avoid
- Empty copy or a bare link with no explanation — customers often treat it as spam.
- Misleading promos, fake prices, or exaggerated claims.
- Repeating the same blast too often until people block or report.
- Content that violates Meta Community Standards (harassment, illegal content, etc.).
Adjust frequency and measure after each send — if blocks or reports rise, change the copy, slow down, or test a smaller segment before the next campaign.
Facebook Messenger: message types to use vs avoid
Messenger broadcast can reach customers who messaged your Page, chatted before, or have history with your shop — keep copy clear, on-topic, and useful. What to avoid is spammy or deceptive content.
Messages that usually work
- Promotions, new products, payment links — clear price and terms.
- Win-back campaigns to people with existing chat history with the Page.
- Order or shipping updates after purchase or an order inquiry.
- Private replies to comments when they relate to that post or product.
- Low-stock alerts or short flash sales.
Messages to avoid
- Empty copy or a bare link with no explanation.
- Misleading promos, fake prices, or exaggerated claims.
- Repeating the same blast too often until people block or report.
- Content that violates Meta Community Standards.
Measure after sending — track replies, orders, and link clicks. If response drops, refine the copy or frequency before the next campaign.
Meta policies can change. This article is practical message-content guidance for shops, not legal advice.
Summary
Broadcast is a direct channel to past customers. It helps drive repeat sales and reduces reliance on post reach alone. If your shop already has a customer base in chat, planning broadcast campaigns systematically is often more effective than posting alone.