When a prospect asks ChatGPT which companies are best in your category, some brands appear consistently and others don't exist in the answer at all. Traditional search rankings predict almost nothing about AI visibility — research shows that 80% of URLs cited by major AI platforms don't even rank in Google's top 100. This guide breaks down exactly why AI systems cite some brands over others, how each platform weights different sources differently, how sentiment about your brand is formed in AI responses, and what you can actually do to measure and improve your position before your competitors figure it out first.