The speaker discusses deploying Galera clusters in the real world. Galera cluster is highly scalable and allows for the addition and deletion of nodes on the fly. It is recommended to have a minimum of three nodes, with each node containing a copy of the data. There is support for parallel replication and an optimized network protocol. The speaker also mentions the clone SSD feature, which is available in Galera Manager and speeds up the provisioning of new nodes. They highlight the compatibility of Galera with MariaDB and MySQL, as well as the common setups and trade-offs associated with Galera clusters. The speaker concludes by providing further resources for additional reading.