Which of the following is NOT a KPI for AI search optimization?

Keyword rankings are a traditional SEO metric, but they are less relevant for AI search optimization. AI search engines prioritize understanding user intent and providing comprehensive, contextually relevant answers, often synthesizing information from multiple sources rather than simply listing pages based on keyword density. While keywords still play a role in content creation, direct ranking for specific keywords is not a primary KPI for measuring AI search success. Share of voice, citations or sources, and brand mentions are all more indicative of AI search performance. Share of voice reflects how often your brand or content appears in AI-generated responses. Citations or sources measure how frequently your content is referenced by AI models. Brand mentions track how often your brand is discussed or recognized by AI. These metrics better reflect the AI's ability to understand, synthesize, and present information from your content.