Google App scripts:

• Is a programming interface in the Google  Suite platform.
• Can replaced Microsoft excel Macros / VBA development
• Runs on Google Cloud and allows users to automate tasks across Google Suite products, Google APIs and external APIs.
• Interacts with other G Suite products: G Suite products like Gmail, Sites, Spreadsheets, Slides, Calendar can be integrated into one comprehensive system.
• Is an alternative  connector to other services like AdSense, Analytics, Maps, Google Analytics 360...
• Is a Scheduling of tasks: Since Google Apps Script is in the cloud, user can set it up to run periodically without human interface.