About
The provided website text does not describe a Mac app called "Backblaze Restore" and contains no features specific to such an app, so I can't write an accurate description of it without inventing details.
What the text does cover is Backblaze's broader offerings: B2 Cloud Storage (S3-compatible object storage with free egress), B2 Overdrive for high-throughput workloads, and Computer Backup, which the page describes as automatic, unlimited, secure cloud backup for Macs and PCs. The Computer Backup section is the closest match to restore-related functionality, but the text does not mention a restore app or how restoring works.
For a description of the Backblaze Restore app itself, its product page or documentation would be needed.
What's new
All release notesHomebrew cask backblaze-restore 10.0.3.1076 (sha256 no_check).