The document explains how businesses can benefit from re-using their Windows Server licenses in Azure using the Azure Hybrid Benefit, which allows for significant cost savings, with up to 80% reduction in Azure pricing when combined with reserved instances. It highlights the advantages of modernizing server workloads with Azure, including improved application delivery, security, and reduced administration. Additionally, it emphasizes Azure's unique offerings, such as free extended security updates for Windows Server 2008 and 2008 R2, and the ability to leverage both PaaS and IaaS savings on SQL Server.