Google Drive is an online storage service that provides 15GB of free cloud storage, allowing users to store and create documents, share folders and files with others, or use it as a middle ground for collecting and transferring data to external services. Google Drive integrates seamlessly with other Google apps, such as Google Docs, Sheets, Slides, and more. The service offers various features, including creating and uploading folders and files, sharing files and folders with others, searching for files, downloading files, and automating workflows using integrations like Zapier's Google Drive integration. Google Drive also has a desktop and mobile app, allowing users to access their files on multiple devices.