The FinOps Open Cost and Usage Specification (FOCUS) is an open standard that simplifies the process of understanding and managing cloud costs by normalizing cost and usage data from multiple providers. It was created by a group of FinOps practitioners, CSPs, SaaS providers, and other contributors in an open source project led by the FinOps Foundation. FOCUS provides a vendor-agnostic format for providers to deliver their cost and usage data, enabling users to analyze costs from all providers. The specification defines a set of columns that describe charges, including fields such as charge description, billed cost, service name, consumed quantity, and consumed unit. It also includes features like normalization, flexibility, and maintenance by the FinOps Foundation. FOCUS has been adopted by major public clouds and is being actively used by Datadog to provide a unified view of cloud costs. By adopting FOCUS, organizations can gain complete visibility into their total cloud spend, launch and mature a FinOps practice, and make data-driven decisions to optimize their cloud spending.