Source Authority for LLMs

Source Authority for LLMs measures the credibility and authority a website holds in the eyes of language models (GPT, Claude, Gemini, Perplexity, etc.). Unlike traditional Domain Authority based primarily on backlinks, this authority depends on factors such as citation frequency in training corpora, factual content consistency, brand reputation, structured data presence, and editorial quality. Optimizing source authority for LLMs is a fundamental pillar of GEO. Strategies include regular publication of expert and factual content, obtaining citations in reference sources, strengthening brand presence on Wikipedia and trusted databases, and clear information structuring via schema.org.