LLM Guidance Doesn’t Transfer The Way SEO Guidance Did via @sejournal, @DuaneForrester
The Shift from Shared Web Standards to Proprietary AI Ecosystems For over two decades, search engine optimization (SEO) operated on a relatively predictable playground. If you optimized a website to rank highly on Google, those optimization efforts naturally spilled over to other search engines like Bing, Yahoo, and DuckDuckGo. The underlying mechanics of search engines were built upon a shared philosophy: crawling, indexing, and ranking based on links, technical performance, and structured on-page content. This portability of SEO was not an accident. It was the result of deliberate, industry-wide standards. Giants of the search era came together to agree on universal frameworks. Protocols like robots.txt, XML sitemaps, and Schema.org structured data were established so that webmasters could communicate with all search engines simultaneously using a single, unified language. As we transition into the era of Generative AI and Large Language Models (LLMs), this collaborative foundation has vanished. According to industry veteran Duane Forrester, writing for Search Engine Journal, the shared standards that once made one engine’s guidance apply to all of them never got built between LLM providers. Today, optimization is no longer portable. An optimization strategy that makes your brand the top recommendation in OpenAI’s ChatGPT may have zero impact—or even a negative impact—on how Google’s Gemini, Anthropic’s Claude, or Meta’s Llama process and present your information. To survive in this fragmented search landscape, digital marketers, content creators, and SEO professionals must understand why LLM guidance does not transfer, how these models process data differently, and how to build a diversified optimization strategy for an AI-driven world. The Era of Portable SEO: How We Got Here To understand why the current state of LLM optimization is so fragmented, we must first look at the history of traditional search engine optimization. In the early days of the web, search engines were highly fragmented, each using proprietary and often primitive algorithms to index the web. However, as the web scaled, the necessity for shared protocols became undeniable. This led to groundbreaking collaborations between competitors. Google, Yahoo, and Microsoft (Bing) came together to support initiatives like Schema.org in 2011. This created a shared markup vocabulary that allowed search engines to understand the context of web content in a structured way. If you implemented product schema for Google, Bing understood it just as clearly. Similarly, the robots.txt protocol allowed webmasters to manage crawl budgets across all search engines globally with a single file. Because of these shared standards, SEO guidance was highly portable. If an SEO consultant recommended improving page load speed, optimizing header tags, and building high-quality backlinks, those actions improved visibility across the entire search engine ecosystem. The optimization playbook was universal. The Architectural Divide: Why LLMs Break the SEO Playbook Large Language Models do not operate like traditional search indexers. Traditional search engines crawl the web, store pages in a massive index, and use retrieval algorithms to match user queries with the most relevant indexed URLs. LLMs, on the other hand, are neural networks trained on massive corpora of text to predict the next most likely word in a sequence. When a user asks an LLM a question, the model does not simply pull up a list of blue links. It generates a response based on its internal weights, parameters, and fine-tuning. Even when LLMs utilize Retrieval-Augmented Generation (RAG) to fetch live web data, the way they select, parse, synthesize, and cite that data is entirely proprietary and highly customized. 1. Unique Training Data and Weighting Each major AI provider sources, filters, and weights its training data differently. OpenAI’s GPT models, Google’s Gemini, and Anthropic’s Claude do not train on the exact same datasets, nor do they treat those datasets with equal priority. A brand that is heavily featured in the specific web crawl data used by OpenAI might be completely absent from the proprietary datasets used by Google or Meta. Because the foundational training data is different, the baseline knowledge of each LLM is fundamentally inconsistent. 2. Proprietary RAG (Retrieval-Augmented Generation) Pipelines RAG is the technology that allows an LLM to search the live web to answer time-sensitive queries. However, the search engines powering these RAG systems are completely different. ChatGPT Search relies on Bing’s search index alongside custom scrapers and direct licensing agreements with publishers. Google Gemini relies on Google’s own search index. Perplexity uses a hybrid model of several indexes. Because the underlying search indexes and retrieval algorithms differ, the source documents fed into the LLM’s context window vary wildly from one platform to another. 3. Reinforcement Learning from Human Feedback (RLHF) How an LLM behaves is largely determined by its alignment phase, specifically Reinforcement Learning from Human Feedback (RLHF). This is where human evaluators grade model responses to shape its tone, safety protocols, and formatting preferences. Anthropic places a massive emphasis on helpfulness, harmlessness, and honesty (the “3 Hs”), which leads to highly analytical and cautious outputs. OpenAI models may prioritize direct, actionable utility. These distinct personality profiles change how each model chooses to mention, recommend, or omit specific brands and websites in its generated answers. The Fragmentation of Generative Engine Optimization (GEO) As traditional SEO expands into Generative Engine Optimization (GEO) or LLM Optimization (LLMO), the lack of shared standards is creating distinct optimization tracks. What works for one model does not translate to another. Let’s look at how optimization strategies fragment across the major AI players. Optimizing for OpenAI (ChatGPT Search) To be cited and recommended by ChatGPT, brands must understand OpenAI’s unique content acquisition strategy. OpenAI has bypassed traditional web crawling standards in many ways by securing direct multi-million dollar licensing partnerships with major media conglomerates. If your content is not part of these preferred partner networks, your organic visibility inside ChatGPT relies heavily on being easily parsable by GPTBot. Furthermore, ChatGPT’s RAG system heavily favors direct, authoritative answers that resolve user intent without requiring them to click through to a website. Optimizing for ChatGPT requires structuring content in clear, concise bullet points, direct definitions, and Q&A formats that the model can