This means that if you create a code for a Google Sheets document and save it, you can access it from anywhere. Since Google Sheets (and other Google Apps) are cloud-based (i.e., can be accessed from anywhere), your Google Apps Script is also cloud-based. This Google Apps Script (GAS) coding language uses Javascript and is written in the back-end of these Google Sheets (there is a neat interface that allows you to write or copy/paste the code in the back-end). However, most of what I cover here can also be used for other Google Apps. In this tutorial (and on this site), I will be focussing on using Script for Google Sheets. Google Apps Script is a coding language and allows you to create automation and functions for Google Apps (which can include Google Sheets, Google Docs, Google Forms, Drive, Maps, Calendar, etc.) Create a Custom Formula With Google Apps Script.Automatically Generate Charts With Google Spreadsheets Script.Anatomy of the Google Sheet Script Editor.Where Is the Script Editor in Google Sheets?.Getting Started with Google Sheets Script Editor.Extend the Functionality of Google Sheets.Can You Create New Functions in Google Script Language?.