Controlling a WiFi module through internet server

Projects Networking, Protocols, and Devices
1

Is it possible to control an Arduino project through the internet theoretically from the other side of the world, as long as both the computer and the Arduino has a wifi connection?
I thought about creating a web host with domain and connect the wifi driver of the Arduino to this domain and by connecting to this website/host on my computer I would be able to change something in the website so the wifi driver of the Arduino could read this and respond, for example turning on and off and LED.
And all this communication will be through a website host that both my computer and my Arduino will be connected to and so I'll be able to control it.

Is such a thing even possible? how can I make the wifi driver to read a certain change on the website and make the Arduino respond?

2

it is called Internet of Things and everyone is doing it. see Blynk for example

3

over the internet you can use the WiFi TCP/IP stack to communicate with servers using either TCP or UDP, e.g. use HTTP POST and GET to transfer information
the arduino will need to know the servers URL or IP address to communicate with it