A website is a conversation, not a place
When you type checkvibe.dev into a browser, nothing is "opened" the way a file on your laptop is opened. Your browser sends a message to another computer somewhere in the world, and that computer sends a message back.
The message you send is called a request. The message that comes back is a response. Everything on the web is that pair, repeated thousands of times a second.
Your browser
the client
Request
GET /pricing
Our server
runs the code
Response
HTML, 200 OK
Every page you have ever loaded is this, repeated.
Request out, response back. That is the whole web.