Competitors' TikTok and native ads are doing more than competing for attention—they are generating engagement and creative signals that increasingly influence the algorithms shaping category discovery. This article explains how creative velocity, TikTok's AI infrastructure, audience-selection systems, and authenticity signals can create compounding advantages for brands that move faster. It presents competitive ad intelligence as a form of AI brand defense, helping marketers monitor competitor creative, decode the category narratives being reinforced, counter-program with differentiated messaging, and maintain guardrails around their own AI-assisted creative systems.