ajv-keywords extends the popular JSON schema validator, Ajv, with custom keywords, enhancing validation capabilities. It offers various valuable keywords beyond the standard JSON Schema specification, such as instanceof, select, and switch, providing fine-grained control over data validation. Integrating ajv-keywords allows developers to define more complex and tailored schemas, improving the reliability and robustness of data processing within applications. This empowers schema authors with richer expressive power for validating JSON documents.