AWS networking hub that connects multiple networks together through a central point. Like a major highway interchange where all roads meet - instead of building direct connections between every city, you build one central hub.
A large company uses Transit Gateway to connect 50 different VPCs across multiple regions, simplifying their network architecture from hundreds of connections to just 50.
All provide hub-and-spoke connectivity to simplify routing between many networks. AWS Transit Gateway is a regional routing hub for VPCs/VPN/Direct Connect. Azure Virtual WAN is a managed global transit network using hubs. GCP Network Connectivity Center provides a hub for connecting VPCs and hybrid spokes. OCI Cloud Router provides a central routing entity for attachments such as DRG/VNets (depending on architecture) to reduce mesh complexity.