Your public IP is the address the internet sees when you connect. It's assigned by your ISP and can reveal your approximate location, provider, and connection type.
An IP address (Internet Protocol address) is a numerical label assigned to every device that connects to a network. It serves two purposes: identifying the host or network interface, and providing the location of the host in the network. Without IP addresses, devices would have no reliable way to find each other — every packet of data you send or receive is routed using the destination and source IP addresses embedded in it.
There are two versions in active use. IPv4 addresses look like
192.168.1.1 — four numbers from 0 to 255 separated by dots, giving roughly
4.3 billion possible addresses. That pool is exhausted, which is why
IPv6 was introduced. IPv6 addresses look like
2001:4860:4860::8888 — eight groups of hex digits separated by colons —
and provide a practically unlimited address space. Most modern networks support both,
often simultaneously (this is called dual-stack).
Your IP address is almost certainly dynamic, meaning your ISP reassigns it periodically — sometimes after every reconnect, sometimes every few months. It is not permanently tied to you as a person. If you need a stable address (for a home server or remote access setup), ISPs offer static IPs as a paid add-on. Businesses often use static IPs so their services are reliably reachable at the same address.
When you visit a website, the server can see your IP address — that's unavoidable, because it needs to know where to send the response. From your IP, the site can determine your approximate location (usually city-level, rarely more precise than that), your ISP, and whether you're using a VPN or proxy. Websites cannot see your exact street address, your name, or your device's hardware details from your IP alone. More precise identification requires additional data like cookies, browser fingerprinting, or account sign-in.