IP addresses, short for "Internet Protocol addresses," are unique numerical labels assigned to every device connected to the internet. They serve as digital identifiers, allowing computers to find and communicate with each other across the vast global network. IP addresses are crucial for data routing, making sure your online requests reach their intended destinations. There are two main types: IPv4, with a format like 192.168.1.1, and IPv6, a longer format designed to accommodate the growing number of internet-connected devices.