Web Indexing is the process by which search engines discover, select, crawl, render, and store web content to make it available in search results. When a crawler like Googlebot or Bingbot accesses a page, it breaks the content into smaller chunks or passages, analyzes each using a Large Language Model (LLM) or Small Language Model (SLM), annotates each chunk with contextual information, assigns a confidence score to that annotation, and then stores the passages as distinct, structured sub-elements of the webpage within the Web Index.