opencode-skill/skills/seo-multi-channel/docs/MULTI_CHANNEL_REQUIREMENTS.md

Multi-Channel Content Requirements Document

Version: 1.0
Date: March 2026
Purpose: Best practices for multi-channel marketing content generation, with emphasis on Thai language markets

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Table of Contents

1. Platform Specifications
2. Thai Language Considerations
3. Content Templates
4. Repurposing Workflow
5. Image Requirements

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1. Platform Specifications

1.1 Facebook (Organic Posts)

Element	Limit	Best Practice
Post body	63,206 chars	Keep 125-250 chars for max engagement
Headline (link posts)	100 chars max	Front-load key message
Hashtags	3-5 recommended	Use Thai-relevant hashtags
Video length	1-240 mins	30-90 seconds optimal
Image size	1200x630 px (1.91:1)	Also support 1080x1080

Thai Market Specifics:

• Best posting times (Thailand): 12:00-13:00, 19:00-21:00
• Thai users prefer casual, relatable content
• Use Thai-language hashtags: #ไทย, #กรุงเทพ, etc.
• Engagement higher with questions in Thai

2026 Algorithm Notes:

• Video content (Reels) prioritized - 60% of content
• Link posts penalized (98% of viewed posts have no external links)
• Groups content receives algorithmic boost
• Meaningful engagement > vanity metrics

1.2 Facebook/Meta Ads

Element	Limit	Recommended
Primary text	5,000 max	125 chars (appears before fold)
Headline	40 chars	25-40 chars optimal
Description	30 chars (mobile), 90 chars (desktop)	80-90 chars
CTA buttons	18 options	Context-dependent

CTA Options (Thai Market):

• เรียนรู้เพิ่มเติม (Learn More)
• สมัครเลย (Sign Up Now)
• ซื้อเลย (Shop Now)
• ดูรายละเอียด (View Details)
• ติดต่อเรา (Contact Us)

Character Truncation:

• Mobile: Primary text cuts off ~125 chars
• Desktop: Headline ~25 chars visible
• Always test mobile-first

1.3 Google Ads (Responsive Search Ads)

Element	Limit	Best Practice
Headlines	15 variations	30 chars each
Descriptions	4 variations	90 chars each
Headline length	30 chars max	Front-load keywords
Description length	90 chars max	Include CTA

Thai Language RSA:

• Each headline/description has separate Thai character limit
• ก (ko kai) counts as 1 character (same as English)
• Pin headlines for A/B testing
• Include Thai keywords naturally in headlines

Ad Extensions (Required for full coverage):

• Sitelinks: 6-8 (25 chars each)
• Callouts: 4-6 (25 chars each)
• Structured snippets: 1 header + 6 values
• Call extension: Optional

1.4 X/Twitter (2026)

Element	Limit	Best Practice
Post length	280 chars	200-260 for threads
Thread	Up to 25 posts	5-10 optimal
Hashtags	2-3 per tweet	End of tweet
Media	1 image/video per tweet	Use images for engagement

2026 Best Practices:

• Hook tweet (first) must capture attention in first 50 chars
• Threads benefit from numbered tweets (1/X format)
• Punctuation and line breaks improve readability
• Questions drive engagement
• Native content (not links) prioritized

1.5 LinkedIn

Element	Limit	Best Practice
Post body	3,000 chars	1,300-1,500 for reach
Article	Unlimited	1,500-2,000 words
Hashtags	3-5	Industry + topical
Video	10 secs - 10 mins	Short-form preferred

2026 Algorithm:

• Prioritizes expertise signals (thought leadership)
• Meaningful conversations > likes
• Interest-based distribution (beyond network)
• Comments drive most reach
• First 200 chars critical for scroll-stopping

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2. Thai Language Considerations

2.1 Character Counting

Platform	English	Thai
Facebook post	63,206 chars	Same (Thai chars count individually)
Facebook headline	40 chars	40 chars (ไทย = 3 chars)
Google Ads headline	30 chars	30 chars
Google Ads description	90 chars	90 chars
Twitter	280 chars	280 chars (Thai properly counts)

Thai Character Properties:

• Thai script: Unicode range U+0E00-0E7F
• Each Thai character = 1 character
• No spaces between Thai words (word segmentation needed)
• PyThaiNLP recommended for word counting

2.2 Tone & Formality Levels

Formal (องค์กร/บริษัท):

• Use ครับ/ค่ะ (polite particles)
• Avoid slang
• Complete sentences
• Professional terminology

Casual (กันเอง):

• May omit polite particles in close-knit communities
• Use contemporary expressions
• More exclamation marks
• Emoji-friendly

Neutral (ปกติ):

• Standard Thai business writing
• Polite but not overly formal
• Clear and direct

2.3 Thai Social Media Specifics

Platform Preferences (Thailand 2026):

• Facebook: Most popular, all demographics
• TikTok: Highest engagement, younger audience
• LINE: Messaging + content consumption
• Instagram: Visual brands, urban
• X (Twitter): News/tech audience

Thai-Specific Hashtags:

• Industry: #ไทย, #กรุงเทพ, #ประเทศไทย
• Trending: Check daily trends
• Niche: Industry-specific Thai terms

Cultural Considerations:

• Respect for monarchy (พระมหากษัตริย์)
• Politeness valued
• Face-saving important in communication
• Relationship-building before business

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3. Content Templates

3.1 Facebook Post Template

{
  "channel": "facebook",
  "template": {
    "hook": "Question or attention-grabbing statement (first 50 chars)",
    "body": "Value proposition, 2-3 sentences max",
    "cta": "Optional: question to drive comments",
    "hashtags": "3-5 relevant hashtags"
  },
  "thai_variant": {
    "hook": "คุณกำลังมองหา[problem]ใช่ไหม? 🎯",
    "body": "[solution] ช่วยคุณได้[benefit]\n\n#hashtag1 #hashtag2 #hashtag3"
  }
}

3.2 Facebook Ads Template

{
  "channel": "facebook_ads",
  "template": {
    "primary_text": {
      "structure": "[Hook - problem/question]\\n\\n[Solution - your offer]\\n\\n[CTA]",
      "length": "125 chars recommended",
      "thai_example": "กำลังมองหาวิธี[solution]?\\n\\nเราช่วยคุณได้[benefit]\\n\\nสมัครเลย!"
    },
    "headline": {
      "structure": "[Benefit or solution focused]",
      "length": "25-40 chars",
      "thai_example": "แก้ปัญหา[problem] ด้วย[product]"
    },
    "description": {
      "structure": "[Additional detail + urgency]",
      "length": "80-90 chars",
      "thai_example": "เริ่มต้น[free_trial] วันนี้ ลองก่อนตัดสินใจ"
    }
  }
}

3.3 Google Ads Template

{
  "channel": "google_ads",
  "responsive_search_ad": {
    "headlines": [
      {"text": "[Primary keyword] - [Benefit]", "pin": false},
      {"text": "[Brand] | [Primary keyword]", "pin": false},
      {"text": "[Solution] สำหรับ [Audience]", "pin": false},
      {"text": "[Number] เหตุผลที่เลือก [Brand]", "pin": false},
      {"text": "[Urgency]: [Offer]", "pin": false}
    ],
    "descriptions": [
      {"text": "[Detailed benefit + CTA]"},
      {"text": "[Social proof + link]"}
    ],
    "thai_headlines": [
      "บริการ[Product] คุณภาพสูง",
      "ราคาพิเศษ สั่งซื้อเลย",
      "[Brand] ผู้เชี่ยวชาญ[Industry]",
      "ส่งเร็ว ทั่วประเทศไทย",
      "รีวิวดี ลูกค้าพึงพอใจ"
    ]
  }
}

3.4 X/Twitter Thread Template

{
  "channel": "x",
  "thread_template": {
    "hook": {
      "content": "Stop-scrolling statement or question",
      "length": "200-250 chars",
      "thai_example": "🔥 [Stat/Claim] ที่[Audience] ทุกคนต้องรู้"
    },
    "body": {
      "structure": "1-8 tweets, each making 1 point",
      "format": "Numbered points (1/, 2/, etc.)",
      "engagement": "Questions, counters, strong opinions"
    },
    "cta": {
      "content": "Final tweet with CTA",
      "thai_example": "ถ้าชอบบทความนี้ follow ด้วยนะครับ ✓\n\n[Link]"
    }
  }
}

3.5 LinkedIn Post Template

{
  "channel": "linkedin",
  "post_template": {
    "hook": {
      "structure": "Personal story or controversial take",
      "length": "First 200 chars critical",
      "thai_example": "ผมเพิ่ง[experience] และได้เรียนรู้ว่า..."
    },
    "body": {
      "structure": "2-3 paragraphs, mixed sentence lengths",
      "expert_signals": "Include data, credentials, specific examples",
      "engagement": "Questions for comments"
    },
    "cta": {
      "structure": "Soft CTA, not salesy",
      "thai_example": "คุณคิดเห็นอย่างไร? แชร์ประสบการณ์ของคุณได้เลยครับ"
    },
    "hashtags": {
      "structure": "3-5 hashtags",
      "format": "[Industry] + [Topic] + [Thailand optional]"
    }
  }
}

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4. Repurposing Workflow

4.1 Blog to Multi-Channel Flow

Blog Post (2000-3000 words)
       │
       ▼
┌─────────────────────────────────────────┐
│  Extract Key Points (10-15 insights)    │
└─────────────────────────────────────────┘
       │
       ▼
┌─────────────────────────────────────────┐
│  Content Atomization                    │
├─────────────────────────────────────────┤
│  • Statistics → Infographic            │
│  • Tips → Carousel slides               │
│  • Quotes → Single images               │
│  • Steps → Thread                       │
│  • How-to → Video                       │
└─────────────────────────────────────────┘
       │
       ▼
┌─────────────────────────────────────────┐
│  Channel Distribution                   │
├─────────────────────────────────────────┤
│  Facebook: 1 post + 1-2 ads             │
│  X: 5-10 tweet thread                   │
│  LinkedIn: 1-2 posts                    │
│  Google Ads: 15 headlines + 4 desc      │
│  Blog: Original (if not published)     │
└─────────────────────────────────────────┘

4.2 Content Repurposing Matrix

Original Content	Facebook	Facebook Ads	Google Ads	X Thread	LinkedIn
How-to article	Carousel post	Primary text	Headlines	Step-by-step thread	How-to post
Listicle	Image posts	Headline focus	List keywords	Numbered tweets	Summary post
Data/Statistics	Infographic	Stat in primary	Numbers in headlines	Key stats thread	Data-driven post
Product review	Video + text	Benefit-driven	Brand keywords	Comparison thread	Review post

4.3 Repurposing Best Practices

1. Start with the longest format: Blog post (SEO value)
2. Extract before adapting: Pull key points first
3. Platform-native: Don't just copy-paste; adapt format
4. Consistent messaging, varied hooks: Same value, different angles
5. Timing matters: Stagger posts, don't dump all at once

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5. Image Requirements

5.1 Platform Image Specs

Platform	Aspect Ratio	Dimensions	Format	Notes
Facebook Feed	1.91:1, 1:1	1200x630, 1080x1080	JPG, PNG	1:1 growing preference
Facebook Stories	9:16	1080x1920	JPG, PNG	Full screen
Instagram Feed	1:1, 4:5, 1.91:1	1080x1080, 1080x1350, 1080x566	JPG, PNG	4:5 gets more space
Instagram Stories	9:16	1080x1920	JPG, PNG
X/Twitter	16:9, 1:1	1200x675, 1080x1080	JPG, PNG	Cards: 800x418
LinkedIn	1.91:1, 1:1	1200x627, 1080x1080	JPG, PNG
Google Ads	1.91:1	1200x628	JPG, PNG

5.2 Text Overlay Guidelines

Platform	Text %	Best Practice
Facebook	<20%	Avoid heavy text, use as accent
Instagram	<20%	Text can be more prominent in stories
Google Ads	<20%	Google may reject >20% text
LinkedIn	<20%	Professional, minimal text

5.3 Thai-Optimized Image Tips

• Use Thai text sparingly: English + numbers more readable
• If Thai text needed: Bold, large, high contrast
• Cultural elements: Thai-friendly aesthetics, Bangkok/Thai contexts
• Colors: Red/white (Thai flag colors) for local relevance
• People: Thai models/faces increase relatability

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Appendix: AI Content Humanization

Avoiding Robotic Patterns

Common AI Mistakes:

• Overuse of transition words (furthermore, additionally)
• Generic openings (In today's world, It's important to note)
• Perfectly structured paragraphs
• Lack of specific examples
• No personal voice or opinion

Humanization Techniques:

1. Vary sentence structure: Mix short punchy + longer flowing
2. Add specific details: Names, dates, real examples
3. Include opinions/takes: "Here's what I think..."
4. Use contractions: Don't → don't (when appropriate for tone)
5. Rhetorical questions: Engage reader directly
6. Cultural references: Thai context, local examples
7. Imperfections OK: Occasionally fragment sentences
8. Active voice: Most of the time

Thai-Specific:

• Add Thai idioms (สำนวน) appropriately
• Use casual markers (ครับ/ค่ะ) correctly
• Reference Thai current events
• Include Thai-specific examples

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References

• Meta Business Help Center - Ad Formats
• Google Ads Help - Responsive Search Ads
• Twitter/X Business - Best Practices
• LinkedIn Marketing Solutions - Content Guidelines
• Sprinklr Social Media Benchmarks 2026
• Thai Digital Marketing Association
• DataReportal Digital 2026 Thailand

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Document maintained for OpenCode SEO Multi-Channel Skill