Been deep in the GEO weeds for a while now and the platform mix that actually drives AI citations is not what most people expect.
Reddit keeps coming up, and for good reason. Detailed, genuinely useful threads get indexed heavily by ChatGPT and Perplexity. Not the shallow brand mentions, the real discussions where people actually solve problems. Quality over quantity every single time.
YouTube is massively underrated here. The transcripts are being pulled by AI models far more than most brands realise. If you are not optimising video content for search, you are leaving visibility on the table.
Review platforms like G2, Product Hunt, and Trustpilot carry serious weight. Strong trust signals, and they get cited constantly in product-related queries across all the major models.
LinkedIn is the B2B play. Best for building authority and professional context, especially if your audience is decision-makers.
One thing that keeps tripping people up: ChatGPT, Gemini, Perplexity, and Grok often return completely different results for the exact same brand query. Testing across all of them is not optional anymore, it is baseline.
Curious what everyone else is seeing. Has anyone found industry blogs or PR to be worth the effort, or is the conversation still dominated by these core platforms?