added background context

pages/docs/tutorials/kafka/managing-schemas-using-schema-registry.md

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 This tutorial will teach you how to manage schemas with Schema Registry. This will enable us to ensure a consistent exchange of data across distributed systems, thus minimizing any errors.
 
 ## Background context
+To handle the evolving complexity of modern Event-Driven Architecture, the need for schema management has become increasingly prevalent. Data validation helps in maintaining data consistency and compatibility. Schema Registry can be used to validate data being exchanged by producers and consumers. 
+
+In this tutorial, we’ve used the Apicurio Registry, which is a popular Schema Registry implementation, in combination with Avro which is a language-neutral data serialization system.
 
 ## Prerequisites