Google One is a subscription plan that provides users with more storage to use across Google Drive, Gmail, and Google Photos. It offers several tiers of storage options, ranging from 100 GB to 30 TB, with prices starting at $1.99 per month. By subscribing to a Google One plan, users can increase their total storage beyond the 15 GB of free storage that comes with every Google account. In addition to extra storage, Google One subscribers also get access to Google experts, can share their storage with up to five family members, and receive extra member benefits such as 10% back in the Google Store and a VPN for multiple devices.
To summarize, Google One is a subscription service that provides users with additional cloud storage and other benefits for a monthly fee.