vRealize Operation Manager 7.5 introduces several new features including a sizing tool, improved installation and upgrade process, allocation model metrics, native application monitoring, and increased automation capabilities. The document outlines each new feature providing details on how to use the sizing tool, install upgrades, enable allocation modeling, set up application monitoring, and automate tasks using the REST API, PowerCLI, and vRealize Orchestration. It also discusses the benefits of the vExpert program including early access programs, private events, training discounts, and opportunities to engage with the VMware community.