Well... the internet is basically a wire which many and many servers are connected to.
If the package is a website ( which is too much ) then they break it up into smaller chunks to send.
The package spreads out when sent.
Every message sent has an IP address it looks something like this 389.435.679.21.
There are underground cables that sent the message they even go under the ocean.
There are over billions of websites on the internet.