Google Drive is a cloud-based storage and collaboration tool that allows users to store files and access them from any device. It provides features like real-time collaboration where multiple users can work on the same file simultaneously, easy file sharing both internally and externally, and version control to manage file revisions. The document provides instructions on getting started with Google Drive, including how to set it up on different devices, upload files, and organize files and folders. It also explains how to use key Drive features like creating and editing files, searching, sharing, and troubleshooting potential issues.