What is the primary benefit of configuring replica seeding?

The primary benefit of configuring replica seeding in Veeam Backup & Replication is reduced WAN traffic. Replica seeding allows for the initial replica to be created using a backup copy that is transported to the DR site, which significantly reduces the amount of data that needs to be transferred over the WAN during the initial replication process.References: Veeam Backup & Replication User Guide, Veeam Replica Seeding Guide