In cloud computing, Bring Your Own License (BYOL) refers to a licensing model that allows customers to apply their existing software licenses to cloud services. This means that customers can leverage their investments in on-premises software licenses when they migrate to the cloud, potentially leading to significant cost savings.

BYOL works by transferring existing software licenses from on-premises environments to the cloud. This is typically done through a process agreed upon by the software vendor and the cloud service provider.

It's important to note that the ability to use BYOL may depend on the specific terms and conditions of the software license, as well as the policies of the software vendor and cloud provider. Some licenses may not allow for transfer to the cloud, or may require additional fees or modifications to do so.

For example, a company might have an existing license for a database software that they use on-premises. If the company decides to migrate its databases to the cloud, it could use the BYOL model to apply this existing license to the cloud-based databases, rather than purchasing new licenses. This could result in significant cost savings for the company.