Build a glossary, definition hub or "what is X" page set that owns the vocabulary of a topic and gets quoted by AI assistants. Use whenever the user mentions a glossary, definitions, "what is" pages, terminology pages, a knowledge base of terms, a wiki, or wants to rank for definitional queries. Also use when a product category has jargon customers don't understand, or when the site needs foundational pages for a topic cluster to link to.