Fill in the blank: The three layers of the AEO measurement pyramid, from bottom to top, are: search performance, __________, and business impact.

The AEO measurement pyramid illustrates a hierarchical approach to evaluating your AI Engine Optimization efforts. The foundational layer, "search performance," tracks traditional SEO metrics like rankings and organic traffic. The middle layer, "AI visibility," measures how well your content is understood and utilized by AI models, encompassing aspects like featured snippets, direct answers, and AI chatbot responses. This layer is crucial because AI engines process information differently than traditional search engines. The top layer, "business impact," connects these digital performance metrics to tangible business outcomes like leads, conversions, and revenue. "Content optimization" is a tactic, not a measurement layer. "Brand awareness" and "citation tracking" are important for overall SEO but don't represent a distinct measurement layer in this specific pyramid model.