Popular LLMs, including Google Gemini and ChatGPT, gather information from a vast online landscape using distinct indexing strategies. A Semrush study revealed that Gemini Pro 1.5 favors sources like Reddit and YouTube, while ChatGPT 4o is more reliant on Google. Consequently, this divergence influences the information provided by each LLM. Despite the rise of generative engine optimization (GEO), traditional search engine optimization (SEO) remains relevant, particularly for ChatGPT, due to its dependence on Google rankings for content visibility.
In some ways, LLMs are a lot like traditional search engines. They index websites and then rank the information they find.
Google Gemini Pro 1.5 indexes more heavily on Reddit, YouTube and Amazon, according to the study conducted by Semrush.
While there is an emerging field of generative engine optimization (GEO) or answer engine optimization (AEO), good old search engine optimization (SEO) still holds a place in the ChatGPT index.
ChatGPT 4o relies more heavily on Google, the Semrush study found, indicating different content focuses between LLMs.
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