What is "what?

As an AI language model, I am not sure what specific information you are asking for related to "what." Could you please provide more context or clarify your question so I can assist you better?

"What" is a pronoun in the English language used to ask about something or identify an object, person, or idea. It can be used in questions, expressions, and requests to gain more information or clarification about a subject. Additionally, "what" can also be used to introduce options or possibilities in a conversation or decision-making process. Let me know if you need more information on a specific aspect of "what."