What is it
Cloud Spanner is a fully managed, distributed, relational database with support for multi-region replication.
When to use it
Use Cloud Spanner as the go-to choice for an operational database to provide persistence for a backend service.
When setting up a new sure to also configure managed backups.
How to learn it
Even though Cloud Spanner is an SQL-compliant relational database, it is implemented by a distributed storage system, which means that it's of the utmost importance to read the documentation to understand how to make use of this database in the best way.