Here’s the professional English translation of your SEO optimization document:

I. Core Elements of Google’s Algorithm Analysis
1.1 Google Ranking Core Algorithm Mechanisms

• PageRank Algorithm: Link weight transfer system

• BERT Model: Natural language understanding & semantic search

• RankBrain: Machine learning ranking factors

• Core Web Vitals: User experience量化 metrics

• E-A-T Principle: Expertise, Authoritativeness, Trustworthiness

1.2 Key Factors Affecting Indexing

• Crawler Accessibility: robots.txt, site structure, internal linking

• Content Quality: Originality, depth, update frequency

• Technical Health: Loading speed, mobile-friendliness, security

• Domain Authority: Backlink quality, brand signals

II. Structured SEO Optimization Framework
2.1 Technical Layer Optimization

1. Website Architecture Optimization

   • Logical URL structure

   • Breadcrumb navigation system

   • Dynamic XML sitemap updates

   • Canonical tag configuration

2. Performance Optimization

   • LCP optimization (Above-the-fold loading <2.5s)

   • CLS control (Layout shift <0.1)

   • FID optimization (Interaction delay <100ms)

   • Resource preloading strategy

3. Mobile Adaptation

   • Responsive design

   • Dedicated mobile detection

   • AMP accelerated pages

2.2 Content Layer Optimization

• Keyword Matrix:
  Core terms (Search volume 1000+)
  Long-tail terms (Conversion rate >3%)
  LSI terms (Relevance >80%)

• Content Production Standards:
  In-depth content (Word count ≥2000)
  Structured data (Schema markup)
  Multimedia integration (Video/charts占比30%)
  Content refresh机制 (Quarterly update rate ≥20%)

2.3 Authority Building System

1. Backlink Strategy

   • Authority media backlinks

   • Industry directory listings

   • Guest blog network

   • Brand term natural mentions

2. Social Signal Enhancement

   • Knowledge Graph optimization

   • Brand search volume growth

   • Social platform content distribution

III. Indexing Issues Diagnosis & Solutions
3.1 Indexing障碍 Diagnostic Process

• Crawler simulation testing (Google Search Console)

• Index coverage analysis (Identify “crawled but not indexed” pages)

• Technical audit: JS rendering, redirect chains, etc.

• Content quality evaluation: Originality detection & similarity comparison

3.2 Typical Problems & Solutions

IV. Ranking Enhancement Strategy Matrix
4.1 Keyword Competition Strategy

• Blue ocean term mining (KD<30, traffic>500)

• Q&A content (Featured snippet triggers)

• Local optimization (GMB synchronization)

4.2 User Experience Optimization

• Dwell time extension (Content chunking design, CTR>3%)

• Bounce rate control (Precise internal linking, reduction≥15%)

• Conversion path optimization (Structured CTA design)

V. Performance Monitoring & Iteration
5.1 Core KPI System

• Indexation rate: Target ≥90%

• Ranking stability: TOP3 fluctuation <15%

• Organic traffic: Monthly growth ≥8%

• Conversion value: CVR improvement

5.2 Optimization Iteration Cycle

1. Data collection phase (1-3 days)

2. Problem diagnosis (3-5 days)

3. Solution implementation (1-2 weeks)
   4.效果 monitoring (4-8 weeks)

4. Strategy iteration (Quarterly updates)

*This solution is validated by 200+ website optimization cases, delivering average results of:*

• 40-70% indexation rate improvement

• 50+ ranking position increase for target keywords

• 120-300% organic traffic growth
  (Actual results vary by website condition)

Note: All strategies strictly comply with Google Webmaster Guidelines, rejecting black-hat SEO. Custom adjustments recommended with Google Search Console & Analytics data.