I am a beginner plz tell me what is API key and what is its use
Hello @Ajjaz_Abbas,
An API key is a unique secret code used to identify and authenticate your application when it connects to the Gemini API. It acts like a password that grants you access to use the services. To learn more about how to get and manage an API key, refer to the API Key documentation and to see how to apply it when building a project, refer to the Quickstart guide.