Blockchain as a Service (BaaS) is a cloud-based offering that allows businesses and developers to use blockchain technology without the complexities of building and maintaining their own blockchain infrastructure. It provides a ready-to-use environment for creating, deploying, and managing blockchain applications, making it easier for organizations to adopt and integrate blockchain solutions into their existing systems. BaaS providers handle the underlying infrastructure, security, and maintenance, allowing users to focus on developing and deploying their blockchain-based applications and services more efficiently.