Search Visibility OS
Google publishes official guidance for generative AI Search visibility
Google Search Central published a guide explaining generative AI Search, including RAG, query fan-out, and its position that core SEO practices remain relevant.
Google launches AI Overviews broadly in U.S. Search
Google announced expanded AI Overviews in Search, bringing generated summaries and supporting web links to a broad U.S. audience.
Google expands AI Mode and Deep Search using query fan-out
Google said AI Mode’s query fan-out can break questions into subtopics and that Deep Search can issue hundreds of searches to produce cited research.
Cloudflare separates AI traffic into Search, Agent, and Training
Cloudflare introduced a crawler-purpose taxonomy separating Search, Agent and Training traffic and announced new default controls.
Google announces Search Generative Experience (SGE)
Google announced its Search Generative Experience, using generative AI to organize and synthesize information in Search.
Retrieval-Augmented Generation (RAG) is formalized in research
Researchers introduced RAG models that combine pretrained generative models with retrieved non-parametric knowledge.
Microsoft launches the new AI-powered Bing
Microsoft launched an AI-powered Bing experience combining search, conversational answers and source-linked web information.
Perplexity launches its answer engine
Perplexity states that it launched its first answer engine in December 2022, combining AI-generated answers with web sources and inline citations.
Cloudflare’s new Search / Agent / Training crawler defaults take effect
Cloudflare’s announced defaults take effect for new domains: Training and Agent traffic is blocked by default on ad-supported pages while Search remains allowed; multi-purpose crawlers are governed by their most restrictive applicable purpose.
Anthropic launches web search on the Claude API
Anthropic added web search to its API, allowing Claude-based applications to retrieve current web information and return citations.
Schema.org establishes a shared structured-data vocabulary
Bing, Google and Yahoo collaborated on Schema.org, creating a shared vocabulary for structured data on web pages.
Google launches the Knowledge Graph: “things, not strings”
Google introduced the Knowledge Graph to model real-world entities and their relationships rather than relying only on keyword matching.
Google introduces AI Mode and describes query fan-out
Google introduced experimental AI Mode and described a query fan-out approach that runs multiple related searches across subtopics and data sources.
OpenAI WebGPT demonstrates browser-based answering with citations
OpenAI published WebGPT, a GPT-3-based system that searches the web, follows links and cites sources while answering questions.
BERT improves Google Search’s language understanding
Google deployed BERT to better understand the intent and context of natural-language search queries.
Perplexity introduces Q2D-Web for large-scale retrieval evaluation in agentic RAG
Perplexity released Q2D-Web, a production-shaped retrieval benchmark built around 190 million web documents and 69,721 agent-reformulated queries across 10 languages.
Google AI Mode
Google's end-to-end conversational AI Search experience.
Google AI Overviews
Google Search's generated overview experience.
Perplexity
Perplexity's answer-engine and AI search ecosystem.
Google AI Mode and AI Overviews may use query fan-out to issue multiple related searches across subtopics and data sources.
Evidence: established · Confidence 98%
Google states there are no additional technical requirements to appear as a supporting link in AI Overviews or AI Mode beyond being indexed and eligible for a Search snippet.
Evidence: established · Confidence 98%
Optimizing your website for generative AI features on Google Search
Google Search Central · official
AI in Search: Going beyond information to intelligence
Google · official
Generative AI in Search: Let Google do the searching for you
Google · official
Supercharging Search with generative AI
Google · official
Reinventing search with a new AI-powered Microsoft Bing and Edge
Microsoft · official
Does llms.txt materially affect inclusion, citation frequency, or retrieval in major AI search systems?
Adoption does not establish causal visibility impact.
How stable are citations and recommendations across repeated prompts in each major AI search platform?
Probabilistic outputs complicate visibility measurement.