RDF Schema (RDFS) is a framework used to define the structure and relationships of data in the Resource Description Framework (RDF). It provides a set of classes and properties that help describe the semantics of the data, allowing for better organization and understanding of information on the web. RDFS enables developers to create vocabularies that specify how different data elements relate to one another. By using RDFS, data can be more easily shared and reused across different applications, enhancing interoperability and facilitating the integration of diverse datasets.