Final answer:
Azure SQL Database is a PaaS (Platform as a Service) that allows developers to build, run, and manage applications more efficiently by eliminating the need to maintain underlying infrastructure.
Step-by-step explanation:
Azure SQL Database is a cloud-based service provided by Microsoft Azure. It offers a relational database service for several uses such as application support, and it is most accurately described as a Platform as a Service (PaaS). This categorization means that Azure SQL Database provides users with a platform to develop, run, and manage applications without the complexity of building and maintaining the infrastructure typically associated with developing and launching an app.
The service is built on SQL Server database technology and is managed by Microsoft, which takes care of database management functions like patching, backups, and monitoring without user intervention. By leveraging Azure SQL Database, organizations can enjoy managed relational databases that are scalable, highly available, and secure, which allows developers to focus on building their applications rather than managing the database infrastructure.