Power Apps is a cloud-based service from Microsoft that allows users to create custom applications without extensive coding knowledge. It provides a user-friendly interface where individuals can design apps that connect to various data sources, such as SharePoint, Excel, and SQL Server. This enables businesses to streamline processes and improve productivity. With Power Apps, users can build applications for web and mobile devices, making it easier to access information on the go. The platform supports integration with other Microsoft services, like Power Automate for workflow automation, enhancing the overall functionality of the applications created.