AZURE Analysis is PAAS Service that provides enterprise-grade data models in the cloud. Use advanced mashup and modeling features to combine data from multiple data sources, define metrics, and secure your data in a single, trusted tabular semantic data model. The data model provides an easier and faster way for users to perform ad hoc data analysis using tools like Power BI and Excel.

Read more - https://docs.microsoft.com/en-us/azure/analysis-services/analysis-services-overview