LINE OA is the most powerful marketing channel for Thai businesses - over 54 million Thais use LINE daily. But many businesses send broadcasts with only 10-20% open rates or worse - getting blocked by customers. This article teaches techniques that will double or triple your open rate and minimize your block rate.
Why Customers Block Your LINE OA
Main reasons customers block LINE OA accounts:
- •Too frequent - sending daily or multiple times a day annoys customers
- •Irrelevant content - sending women's product promotions to male customers
- •Only selling - every message is "Buy now! Sale!" with no value
- •Too long - messages requiring excessive scrolling without a hook
- •No personalization - identical messages to everyone
Once blocked, customers will never receive your messages again - and you won't even know they blocked you. Retaining existing followers is more important than acquiring new ones.
The Golden Rule: 80/20 Content Split
The most important broadcast rule: 80% value, 20% selling:
- •80% valuable content - tips, useful info, how-to's, news, entertainment
- •20% promotional - discounts, promotions, new products, flash sales
Example: A restaurant sends 5x/month → 4 times recipes/tips/behind-the-scenes → 1 time promotion. Customers look forward to messages because they get value, not just sales pitches.
Writing Broadcast Messages That Get Opened
How to write high open-rate messages:
- 1.Open with a hook - first 2 lines must grab attention: "Did you know? 80% of Bangkok restaurants make this mistake..."
- 2.Use emoji sparingly - 2-3 per message catches the eye without looking spammy
- 3.Keep it short - messages shouldn't exceed 500 characters. Use Rich Message or Card for longer content
- 4.Clear CTA - tell customers what to do: "Tap the link", "Reply 1 for discount", "Book today"
- 5.Create urgency - "Last day today", "Only 10 spots left", "48 hours only"
- 6.Natural language - write like chatting with a friend, not formal advertising
Best Times to Send Broadcasts
Peak LINE reading times (data from Thai businesses):
| Time | Open Rate | Best For |
|---|---|---|
| 11:00-12:00 | Highest | Restaurants (before lunch), general promotions |
| 17:00-18:00 | High | Online shops, general services (after work) |
| 20:00-21:00 | High | Lifestyle products, entertainment (relaxing at home) |
| 08:00-09:00 | Medium | News, content that requires reading |
| Mon-Tue | Higher | Business content, B2B |
| Thu-Fri | Higher | Weekend promotions, restaurants |
Never send late night (after 22:00) or early morning (before 08:00) - customers will block immediately. Test your own timing as each business has a different audience.
Recommended Frequency
Suggested broadcast frequency by business type:
| Business Type | Frequency | Reason |
|---|---|---|
| Restaurant/Café | 2-3x/week | Daily specials, promotions |
| Online Store | 1-2x/week | New products, flash sales |
| Clinic/Health | 2-4x/month | Health tips, monthly promotions |
| Service/Agency | 2-4x/month | Case studies, tips, promotions |
| Real Estate | 1-2x/month | New projects, special offers |
Message Types Ranked by Open Rate
Message types ranked by open rate (highest to lowest):
- 1.Exclusive coupons/discounts - 60-80% open rate (customers feel special)
- 2.Personal notifications - 50-70% (appointments, order status)
- 3.Valuable content - 40-60% (tips, how-to guides)
- 4.News/updates - 30-50% (new products, shop updates)
- 5.General promotions - 15-30% (sales, flash deals)
Segment Before You Send
Segmentation is the single most important broadcast factor. Targeted messages get 2-3x higher open rates than mass sends. How to segment in LINE OA:
- •Tag customers - by behavior: "purchased", "interested in product A", "VIP", "new customer"
- •Demographics - LINE OA has basic gender/age data
- •Location-based - send branch-specific promotions
- •Purchase recency - bought in last 30 days vs inactive 90+ days
Read the detailed segmentation guide: LINE OA Customer Segmentation
How CherCode Helps With LINE OA Broadcast
CherCode sets up automated, targeted broadcast systems:
- •Broadcast Automation - scheduled sends by day, time, and customer segment
- •Segmentation setup - auto-tagging + behavior-based grouping
- •AI Chatbot + Broadcast - chatbot handles chats + broadcast system sends promos. Read more: LINE OA Automation
- •n8n integration - complex workflows like messaging customers inactive for 30 days. Read more: n8n guide
- •Starting at just 5,000 THB - setup + training included
Need targeted broadcasts that don't get blocked? View Automation services or get a free consultation
Frequently Asked Questions
ส่ง Broadcast LINE OA บ่อยแค่ไหนถึงจะดี?
ขึ้นอยู่กับประเภทธุรกิจ แต่หลักทั่วไปคือ ร้านอาหาร/คาเฟ่ ส่งได้ 2-3 ครั้ง/สัปดาห์ ร้านค้าออนไลน์ 1-2 ครั้ง/สัปดาห์ คลินิก/บริการ 2-4 ครั้ง/เดือน สิ่งสำคัญกว่าความถี่คือคุณภาพเนื้อหา - ถ้าทุกข้อความมีคุณค่า ส่งบ่อยได้ แต่ถ้าเป็นโปรโมชันอย่างเดียว ส่งน้อยๆ ดีกว่า ใช้กฎ 80/20 คือ 80% เนื้อหาดี 20% ขายของ
Broadcast LINE OA ฟรีไหม?
LINE OA แบบฟรีส่ง Broadcast ได้ 200 ข้อความ/เดือน (นับต่อคนต่อข้อความ เช่น ส่ง 1 ข้อความถึง 200 คน = 200 ข้อความ) ถ้าต้องการส่งมากกว่านั้นต้องอัปเกรดเป็น Light (599 บาท/เดือน, 5,000 ข้อความ) หรือ Standard (1,699 บาท/เดือน, 15,000+ ข้อความ) ยิ่งมีสมาชิกเยอะ ค่าใช้จ่ายยิ่งสูง ดังนั้นการแบ่งกลุ่มส่งเฉพาะคนที่เกี่ยวข้องจะช่วยประหยัดค่าข้อความได้มาก
Arm - CherCode
Full-Stack Developer & Founder
Software developer with 5+ years of experience in Web Development, AI Integration, and Automation. Specializing in Next.js, React, n8n, and LLM Integration. Founder of CherCode, building systems for Thai businesses.
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