Google Drive is a cloud-based file storage and synchronization service developed by Google. It allows users to store files and folders on Google's servers and access them from any device with internet access. Google Drive offers free storage space up to 15 GB and allows users to purchase additional storage if needed. It also offers features such as file sharing, collaborative editing, and integration with other Google services such as Google Docs, Sheets, and Slides. Users can access their files from the Google Drive website, desktop and mobile applications, and third-party applications that integrate with Google Drive.