Search Engines

  1. Ranking Algorithms
    1. Goals of Ranking
      1. Maximizing Relevance
        1. User Satisfaction
          1. Diversity in Results
          2. Core Ranking Signals
            1. Relevance Signals
              1. On-page Content Analysis
                1. Title and Meta Tags
                  1. Header Tags
                    1. Body Content
                      1. Content Quality
                      2. Keyword Placement and Density
                        1. Title Matching
                          1. Exact Match Domains
                            1. Over-optimization Risks
                          2. Authority and Quality Signals
                            1. Domain Authority
                              1. Trustworthiness Metrics
                                1. Age of Domain
                                  1. Historical Performance
                                2. User Interaction Signals
                                  1. Click-Through Rate
                                    1. Dwell Time
                                      1. Pogo-sticking
                                        1. Bounce Rate
                                          1. User Engagement Metrics
                                            1. Return Visits
                                          2. Foundational Ranking Algorithms
                                            1. PageRank
                                              1. Random Walk Model
                                                1. Damping Factor
                                                  1. Personalized PageRank
                                                  2. HITS Algorithm
                                                    1. Hubs and Authorities
                                                      1. Mutual Reinforcement
                                                        1. Topic-sensitive HITS
                                                      2. Machine Learning in Ranking
                                                        1. Learning to Rank
                                                          1. Pointwise Approach
                                                            1. Pairwise Approach
                                                              1. Listwise Approach
                                                                1. Training Data Generation
                                                                2. Feature Engineering
                                                                  1. Feature Selection
                                                                    1. Feature Importance
                                                                      1. Feature Normalization
                                                                      2. Neural Networks and Deep Learning
                                                                        1. Representation Learning
                                                                          1. Deep Neural Networks
                                                                            1. Transformer-based Models
                                                                              1. BERT and Similar Models
                                                                            2. Combating Spam and Manipulation
                                                                              1. Web Spam Detection
                                                                                1. Content Spam
                                                                                  1. Click Spam
                                                                                  2. Keyword Stuffing
                                                                                    1. Detection Techniques
                                                                                      1. Penalty Mechanisms
                                                                                      2. Cloaking
                                                                                        1. User-agent Detection
                                                                                          1. Content Comparison
                                                                                          2. Negative SEO
                                                                                            1. Attack Vectors
                                                                                              1. Protection Mechanisms

                                                                                          Previous

                                                                                          4. Query Processing and Information Retrieval

                                                                                          Go to top

                                                                                          Next

                                                                                          6. Search Engine Architecture and Infrastructure