Session Replication is a concept within software architecture that allows for stored data across multiple nodes or servers, to eventually be consolidated back into a single session. For example, if an end-user is utilizing an application across several different devices and wants to save their data from each instance of usage, then session replication would store their information in replicated databases to ensure they have access to their data despite their location. Session replication becomes especially useful when the load needs to be distributed evenly across the network of users, ensuring no single node experiences too much pressure during peak times. As a result, this ensures the performance level remains high while also making sure sensitive information stored in the replicated databases isn't lost should one fail unexpectedly.