The document discusses how search engine optimization (SEO) is changing in the age of the semantic web and entities. Traditionally, SEO focused on keywords, links, and volume to influence search results based on probabilities and statistics. However, with the rise of entities, personalized search, and big data, search is becoming less reliant on keywords and more focused on trusted data sources and relationships between data points. Entities provide direct answers to queries rather than suggestions, but optimizing for entities involves optimizing for authority, trust, reputation, influence, and social factors to become a related entity for a given topic.