The PowerApps is an application development platform that is part of the broader Microsoft Power Platform, whose capabilities are built on and utilize Azure cloud services. Dynamics 365 for Sales, Service, Field Service, Marketing, and Talent are all built natively on the platform. In Power Apps, most canvas apps use external information stored in cloud services called Data Sources. A common example is a table in an Excel file stored in OneDrive for Business. Apps access these data sources by using Connections. It's easy to create an app that does basic reading and writing to a data source.