This article explains how to integrate multiple Google Analytics (GA) data from different websites using Google Apps Script and the GA API.To get started, you need to enable the GA API by creating a Google Cloud Platform (GCP) project and enabling the Google Analytics Data API.You also need to obtain the GA resource ID by going to the GA admin dashboard and accessing the "Resource Info" section.The article provides code examples for retrieving metrics like page views, active users, and real-time data using the GA API and Google Apps Script.