JSON Schema is a powerful tool for validating the structure of JSON data. It allows you to define the shape of your JSON, ensuring that your data adheres to specific types, formats, and structural constraints. This is incredibly useful for API design, data storage, and ensuring data quality across various systems. By defining a schema, you can automatically validate incoming data, provide clear error messages when data is malformed, and even generate user interfaces or documentation. Key features include defining properties, specifying required fields, setting data types (e.g., string, number, object, array, boolean, null), and applying constraints like `minLength`, `maxLength`, `pattern`, `minimum`, `maximum`, `enum`, and `items` for arrays. Implementing JSON Schema in your development workflow can significantly reduce bugs related to data inconsistencies and improve the robustness of your applications. It supports various drafts, with Draft 7 being a commonly used standard, and tools are available in most programming languages to facilitate its use.