LLM SEO refers to the practice of optimizing digital content so it can be easily understood, referenced, and recommended by large language models (LLMs). These models power modern AI platforms, conversational search systems, and intelligent assistants that increasingly influence how people discover information online. Unlike traditional SEO, which focuses mainly on ranking in search engine result pages, LLM SEO emphasizes content clarity, authority, and contextual relevance so AI systems can confidently use it as a source of information. When businesses implement LLM SEO strategies, they structure their content in ways that make it easy for AI systems to interpret, summarize, and cite. This includes creating well-organized content, using clear explanations, answering user questions directly, and building topical authority across related subjects. As AI-driven search experiences grow, websites that align their content with LLM understanding are more likely to appear in AI-generated responses, summaries, and recommendations. LLM SEO also involves monitoring how brands and websites are mentioned across AI tools and ensuring the information is accurate and consistent. By focusing on expertise, trustworthiness, and structured information, businesses can increase the likelihood that their content becomes a trusted reference for AI systems. This new approach to optimization expands beyond keywords alone and focuses on knowledge, context, and user intent. As generative AI becomes more integrated into search and digital discovery, LLM SEO will play an increasingly important role in helping websites maintain visibility and authority in the evolving online ecosystem.