Description: Field condition in GraphQL refers to the rules and constraints that determine the behavior of fields within a schema. These fields are the fundamental units that represent the data that can be queried or modified through the API. Field conditions allow defining aspects such as the mandatory nature of a field, its data type, and whether it can be null or not. This is crucial for ensuring data integrity and facilitating validation in queries. Additionally, field conditions can include directives that alter the behavior of fields based on certain criteria, such as user authorization or the context of the request. In summary, field conditions are essential for effectively structuring and managing data in a GraphQL schema, providing clarity and control over how information is accessed and manipulated.