Storing copies of data in multiple geographic locations to protect against regional disasters. Like keeping important documents in safe deposit boxes in different cities.
Cloud storage services keep your files in data centers across different continents so earthquakes or power outages can't destroy your data.
All provide ways to keep data copies in separate geographic regions for disaster recovery. AWS uses per-bucket replication rules (CRR). Azure offers built-in geo-replication options (GRS/RA-GRS) for Storage accounts. GCP provides dual-region buckets that synchronously replicate across two regions in a chosen pair. OCI supports cross-region replication policies for Object Storage buckets.