AI-powered search now processes 1.7 billion queries per day. Your brand is cited in roughly zero of them. That is not hyperbole. Recent studies from Conductor's 2026 AEO/GEO Benchmarks Report and Semrush's AI citation analysis consistently show that 85-90% of brands have no meaningful presence in AI-generated answers across ChatGPT, Perplexity, Gemini, and Claude. The number varies by platform and industry, but the pattern holds: most companies are functionally invisible to AI search. The reason is not that AI search is random or biased. Each platform uses distinct signals to decide which brands to cite. If you understand those signals, you can engineer your visibility. If you don't, you're gambling with your marketing budget on a channel you haven't optimized for. This article breaks down how each major AI search engine selects citations, what data supports those mechanisms, and what you should do differently starting today.…