Google Drive is a cloud-based storage and file sharing service offered by Google. It allows users to store and access files from any device with an internet connection, and share files and folders with others.

Google Drive offers several features, including:

1. Storage: Google Drive provides users with 15 GB of free storage space, which can be used for storing files, documents, photos, and videos.

2. Collaboration: Users can share files and folders with others and collaborate in real-time. Multiple users can edit and work on the same file simultaneously.

3. Syncing: Google Drive automatically syncs files across devices, ensuring that users have access to the latest version of their files on all devices.

4. Security: Google Drive uses advanced security measures to protect users' data, including encryption, two-factor authentication, and regular security audits.

5. Integration: Google Drive integrates with other Google services such as Google Docs, Sheets, and Slides, as well as third-party apps and services.

Google Drive is accessible through a web interface or by downloading the Google Drive app for Windows, macOS, iOS, or Android devices. Users can also access their files offline by enabling offline access in the Google Drive settings.