YugabyteDB, a distributed SQL database, provides various methods for scaling horizontally, including adding nodes to the cluster as needed, and using asynchronous replication or row-level geo-partitioning for multi-region clusters. To keep tablet (shard) count low, users can decrease the number of shards per table or secondary index, or use colocated tables. The database also supports encryption at rest with user-generated keys, column-level encryption, authentication, and audit logging methods to secure data. YugabyteDB offers various resources for learning and exploring its features, including new documentation, blogs, tutorials, videos, upcoming events, and next steps for getting started.