Google Apps Script (GAS) allows users to write scripts that can interact with Google Workspace apps and services from the cloud. GAS scripts can manage spreadsheet data, create add-ons for G Suite apps, and more using JavaScript. To start using GAS, users access it through Google Drive and write scripts in the online code editor. Scripts can then be triggered to run by events like form submissions. GAS integrates with apps like Sheets, Forms, and Sites, allowing scripts to read and modify data across various Google services. Sample use cases demonstrate how GAS can be used to automate tasks like collecting baseball game results.