Agent Skills: Platform Algorithms Deep Dive (2025-2026)

CRITICAL GUIDELINES

Windows File Path Requirements

MANDATORY: Always Use Backslashes on Windows for File Paths

When using Edit or Write tools on Windows, you MUST use backslashes (\) in file paths, NOT forward slashes (/).

Platform Algorithms Deep Dive (2025-2026)

Complete guide to understanding and optimizing for TikTok, YouTube, Instagram, and Facebook algorithms.

Algorithm Fundamentals

How Social Algorithms Work

All major platforms use similar principles:

1. Content Analysis: What is the video about?
2. User Signals: How do viewers interact?
3. Creator Signals: Creator history and behavior
4. Distribution: Who should see this content?
5. Feedback Loop: Performance adjusts distribution

Universal Algorithm Truths

Platforms Want:

• Users to stay on platform longer
• High engagement (interactions)
• Quality content that satisfies users
• Diverse content discovery

What Drives Distribution:

• Watch time (how long people watch)
• Engagement depth (comments > likes)
• Completion rates (especially for short-form)
• Sharing behavior
• Return visits

TikTok Algorithm (2025)

Algorithm Signals

| Signal | Weight | Description | |--------|--------|-------------| | Watch Time | Highest | Total seconds watched | | Completion Rate | Very High | % of video watched | | Replays | High | Video watched multiple times | | Shares | High | Direct shares to others | | Comments | Medium-High | Written engagement | | Follows | Medium | New followers from video | | Likes | Lower (2025) | Heart button taps |

2025 Update: Shallow interactions (likes) have reduced weight compared to deeper signals like watch time and replays.

TikTok's Cold Start System

How New Videos Are Tested:

1. Video published
2. Shown to 200-500 initial viewers
3. Performance measured against benchmarks
4. Strong performance = expanded distribution
5. Weak performance = limited to followers

Cold Start Success Factors:

• First 3 seconds retention
• Completion rate vs video length
• Early engagement velocity
• Replay rate

TikTok Content Preferences

Algorithm Favors:

• Family-friendly content
• Positive emotional tone
• Educational value
• Authentic creator content
• Micro-niche targeting
• Trending sound usage

Algorithm Deprioritizes:

• Controversial/negative content
• Duplicated content
• Low-quality production
• Misleading thumbnails
• Watermarked content from other platforms

Micro-Niche Prioritization

2025 Algorithm Change: TikTok now heavily favors micro-niche over broad appeal.

Benefits:

• Specialized content sees 2.5x better distribution
• Algorithm micro-categorizes: "beginner leg workouts for women" vs just "fitness"
• Niche authority = more algorithm push for new content

Strategy:

• Define specific niche clearly
• Use niche-specific language and hashtags
• Build authority in one area before expanding
• Let algorithm understand your content category

TikTok For You Page (FYP)

How Videos Reach FYP:

1. Initial Test: Small audience batch
2. Performance Check: Engagement metrics evaluated
3. Expanded Test: Larger audience if metrics strong
4. FYP Placement: Continued performance = broader FYP reach
5. Ongoing: Performance at each level determines next reach

FYP Success Factors:

• Hook in first 1.3 seconds
• High completion rate
• Strong replay rate
• Trending sound usage
• Relevant hashtags

TikTok Hashtag Strategy

| Hashtag Type | Purpose | Examples | |--------------|---------|----------| | Broad/Trending | Reach attempt | #fyp, #viral | | Category | Topic discovery | #fitness, #cooking | | Niche | Targeted audience | #beginneryoga, #airfryer | | Branded | Campaign tracking | #YourBrandChallenge |

Optimal Strategy:

• 3-5 hashtags per video
• Mix of niche and category
• Quality over quantity
• Trending hashtags increase engagement 23%

TikTok Posting Schedule

| Metric | Value | |--------|-------| | Recommended frequency | 1-4 times daily | | Views in first 24 hours | 68% | | Peak window improvement | 30% better results | | Growth with 2-4x daily | 2.5x higher follower growth |

YouTube Algorithm (2025)

Long-Form Algorithm Signals

| Signal | Weight | Description | |--------|--------|-------------| | Watch Time | Highest | Total minutes watched | | Audience Retention | Very High | % of video watched | | Click-Through Rate | Very High | Clicks / Impressions | | Session Time | High | Time viewer stays on YouTube | | Engagement | Medium | Likes, comments, shares | | Subscriber Actions | Medium | New subs, bell clicks |

YouTube Shorts Algorithm

| Signal | Weight | Description | |--------|--------|-------------| | Watch Time | Highest | Per-video and cumulative | | Completion Rate | Very High | Essential for short-form | | Engagement | High | All interaction types | | Swipe-Away Rate | High | Inverse signal (lower = better) |

Shorts + Long-Form Connection:

• Shorts help identify resonant audiences
• Algorithm recommends long-form to Shorts viewers
• Combined strategy = 41% faster channel growth

YouTube Discovery Mechanism

Where Videos Are Discovered:

| Source | Description | |--------|-------------| | Home Feed | Personalized recommendations | | Search | Keyword-based discovery | | Suggested | After/alongside other videos | | Browse Features | Trending, playlists | | Notifications | Subscriber alerts | | External | Google search, social shares |

YouTube SEO Signals

Ranking Factors:

| Factor | Importance | |--------|------------| | Watch time | Most important | | Click-through rate | Very important | | Engagement | Important | | Keywords (title, description) | Important | | Closed captions | 94% of top videos have them | | Video length | 8-9 minutes best for search |

SEO Statistics:

• 25%+ of Google searches include video snippets
• Videos can get 2-5x more views from Google ranking
• Top-ranking videos average 29 months in age

YouTube Posting Schedule

| Day | Best Time | Notes | |-----|-----------|-------| | Tuesday | 6-9 PM | Peak performance | | Wednesday | 6-9 PM | Peak performance | | All weekdays | 12-3 PM | Good secondary window | | Friday-Saturday | Afternoon | Broader engagement window |

YouTube Algorithm Optimization

Key Strategies:

1. Maximize Watch Time

   • Front-load value
   • Eliminate dead time
   • Use pattern interrupts

2. Optimize CTR

   • Test thumbnails (up to 3 variants)
   • Compelling titles
   • Curiosity without clickbait

3. Increase Session Time

   • End screens with relevant videos
   • Playlist optimization
   • Content series

Instagram Algorithm (2025-2026)

Instagram Reels Algorithm

| Signal | Weight | Description | |--------|--------|-------------| | Topic Clarity | Very High | Clear content categorization | | Engagement | High | Saves, shares, comments, likes | | Watch Time | High | Duration viewed | | Follows from Reel | High | Audience growth signal | | Audio Usage | Medium | Trending audio preference |

December 2025 Algorithm Update

Key Change: Topic Clarity Emphasis

Instagram now prioritizes content that can be clearly categorized by topic.

Impact:

• Clear niche content gets better distribution
• Mixed-topic creators may see reduced reach
• Keyword optimization becoming more important

The 3/8/12 Rule

Instagram's content evaluation framework:

| Time | Checkpoint | Algorithm Action | |------|------------|------------------| | 3 seconds | Hook evaluation | Continue or abandon | | 8 seconds | Interest deepening | Engagement prediction | | 12+ seconds | Value delivery | Distribution decision |

Instagram Trial Reels

New Feature (2025): Test content without risking engagement metrics.

Benefits:

• Risk-free experimentation
• No negative impact on feed
• Learn what works before full publish
• Test hooks, formats, topics

Instagram Hashtag Evolution

2025 Shift: Instagram moving from hashtags to keyword-based SEO.

New Strategy:

• Focus on keywords in caption
• Reduce hashtag quantity (3-5 vs 30)
• Posts with at least one hashtag: 12.6% more engagement
• Think "what would someone search for?"

Instagram Posting Schedule

| Day | Best Time | Notes | |-----|-----------|-------| | Tuesday | 11 AM - 6 PM | Peak engagement | | Wednesday | 11 AM - 6 PM | Peak engagement | | Thursday | 11 AM - 6 PM | Peak engagement |

Best Practices:

• Consistency matters more than perfect timing
• 1-2 Reels daily recommended
• Test different times with your audience

Facebook Reels Algorithm

Algorithm Signals

| Signal | Weight | Description | |--------|--------|-------------| | Shares | Very High | Facebook's core mechanic | | Comments | High | Discussion generation | | Watch Time | High | Completion rate | | Reactions | Medium | Emotional responses | | Saves | Medium | Bookmark behavior |

Facebook Algorithm Priorities

Content Preferences:

• Share-worthy content (highest priority)
• Conversation-generating posts
• Native content (not cross-posted quality issues)
• Vertical video format (70% brand lift)

Facebook Posting Schedule

| Time | Performance | |------|-------------| | Late Friday night | Highest views | | Midnight into Saturday | Peak performance | | First 1-2 hours | Critical for reach |

Key Insight: Facebook Reels timing is notably different from other platforms.

Facebook vs Instagram Cross-Posting

When to Cross-Post:

• Content fits both audiences
• No platform-specific elements that don't translate
• Quality maintained across platforms

When Not to Cross-Post:

• Content too casual for Facebook audience
• Instagram-specific features used
• Audience preferences significantly differ

Platform Comparison

View Count Definitions

| Platform | Time for 1 View | |----------|-----------------| | YouTube | 30 seconds | | Facebook | 3 seconds | | LinkedIn | 2 seconds | | Instagram | 3 seconds | | TikTok | 3 seconds |

Optimal Video Lengths

| Platform | Short-Form | Long-Form | |----------|------------|-----------| | TikTok | 15-30 seconds | N/A | | YouTube Shorts | 50-60 seconds | N/A | | YouTube Long | N/A | 8-15 minutes | | Instagram Reels | 7-30 seconds | N/A | | Facebook Reels | 15-30 seconds | N/A |

Engagement Priority

| Platform | Top Priorities | |----------|---------------| | TikTok | Watch time, replays, shares | | YouTube | Watch time, CTR, session time | | Instagram | Topic clarity, engagement, watch time | | Facebook | Shares, comments, reactions |

Hashtag Strategy Comparison

| Platform | Strategy | |----------|----------| | TikTok | 3-5 hashtags, mix niche + category | | YouTube | Keywords > hashtags, max 15 | | Instagram | 3-5 relevant, keyword optimization | | Facebook | Minimal hashtags, focus on shares |

Algorithm Optimization Framework

Universal Optimization Strategy

1. Hook Optimization (All Platforms)

   • 1.3-3 seconds critical
   • Pattern interrupt + curiosity

2. Retention Optimization (All Platforms)

   • Minimize drop-offs
   • Pattern interrupts throughout
   • No filler content

3. Engagement Optimization (Platform-Specific)

   • Encourage comments
   • Add share triggers
   • Include clear CTAs

4. Discovery Optimization (Platform-Specific)

   • Hashtag strategy
   • Keyword optimization
   • Trending sound usage

5. Consistency (All Platforms)

   • Regular posting schedule
   • Content category focus
   • Quality maintenance

Content Type by Platform

| Content Type | Best Platform | Why | |--------------|---------------|-----| | Entertainment | TikTok | Shortest attention, discovery-focused | | Educational | YouTube Long | Depth valued, search discovery | | Product/Commerce | TikTok | Shop integration, buying intent | | Professional | LinkedIn | B2B audience, career focus | | Lifestyle | Instagram | Visual-first, aesthetic-driven | | News/Trending | TikTok | Speed of trend adoption |

Algorithm Changes to Watch

2025-2026 Trends

Across All Platforms:

• Increased AI content moderation
• Authenticity signals becoming more important
• Micro-niche content preference
• Watch time prioritization increasing
• Shallow engagement (likes) decreasing in value

Platform-Specific:

| Platform | Expected Changes | |----------|-----------------| | TikTok | More shop integration, niche refinement | | YouTube | Shorts/long-form synergy, CTV optimization | | Instagram | Continued keyword SEO shift | | Facebook | Meta AI integration, Reels priority |

Staying Updated

Monitor:

• Official platform blogs and announcements
• Creator earnings and reach changes
• New feature rollouts
• Industry analyst reports
• Your own analytics patterns

Quick Reference

Algorithm Success Checklist

TikTok:

• [ ] Hook in 1.3 seconds
• [ ] Trending or appropriate sound
• [ ] 3-5 relevant hashtags
• [ ] Clear niche focus
• [ ] High completion potential

YouTube:

• [ ] Compelling thumbnail (test 3 variants)
• [ ] Keyword-optimized title/description
• [ ] Strong hook (5-10 seconds)
• [ ] Closed captions included
• [ ] End screens/cards configured

Instagram:

• [ ] Clear topic/niche
• [ ] 3/8/12 structure
• [ ] Keyword-rich caption
• [ ] 3-5 relevant hashtags
• [ ] Sound-off friendly (captions)

Facebook:

• [ ] Share-worthy content
• [ ] Conversation starters
• [ ] Vertical format (9:16)
• [ ] Weekend timing considered
• [ ] Native upload (not cross-posted link)