Transmission Control Protocol - ensures reliable, ordered delivery of data over networks. Like registered mail that guarantees delivery and confirms receipt.
Web browsers use TCP to ensure that web pages are downloaded completely and in the correct order.
TCP (Transmission Control Protocol) is an Internet standard transport-layer protocol, not a cloud-provider service. All major clouds support TCP traffic across their networking products (VPC/VNet/VCN, load balancers, VPNs, interconnects) and compute instances.