Traffic On TCP Port 443 Provide That Isn’t On TCP Port 80

What does traffic on TCP port 443 provide that isn’t on TCP port 80?

Transport-level encryption

TCP is an acronym for Transmission Control Protocol.

Hypertext Transfer Protocol Secure (HTTPS) includes transport level encryption with Transport Level Security (TLS) on TCP port 443.
HTTP uses TCP port 80, but it does not provide transport level encryption.