Knowledge Graph is a structured database of entities and relationships used by search systems to understand the world.
It matters because search behavior is becoming more conversational and answer-driven. Clear, authoritative, well-structured content gives both users and AI systems a better chance of understanding and referencing your brand accurately.
Example
A search system may connect a business with its location, founders, and official website as related entities. Accurate public information helps disambiguation, but a business cannot assume that supplying a fact will create or control a knowledge panel.