Google Drive is a cloud storage and synchronization service from Google that allows users to store files, share files, and edit documents, spreadsheets, and presentations online. It provides online storage for files and allows users to access and edit files from any device with an internet connection. Google Drive is available for free with 5GB of storage, and additional storage can be purchased starting at $2.49 per month for 25GB. While Google Drive provides advantages like accessibility from any device and real-time collaboration, it also has disadvantages like dependency on internet access to retrieve files and potential security issues from data being stored remotely in the cloud.