"IP" stands for "Internet Protocol." And “protocol” here refers to the connectivity regulations and guidelines that govern computer networks.
The "address" part of IP address refers to a unique set of numbers linked to all your internet activities.
Putting all this together, an Internet Protocol address is a string of unique numeric identifier separated by periods, and carried by every device in a network. This includes every single computer, router, modem, printer, switch, and any other device that is part of a TCP/IP-based network.
This address makes up the core component upon which the networking architecture is built and no network exists without it.
An IP address is not something you sign up for; once you're online, you're automatically assigned an active IP address by your Internet Service Provider (ISP). An active IP address is necessary for you to access the internet.
And note this: IP addresses are not assigned to people, but to computers.