Every computer connected to the internet must have a unique address known as an IP address. The IP address is a numeric address written as a set of four numbers separated by dots, for example 18.104.22.168. The address provides a unique identification of a computer and the network it belongs to.
You have a dynamic IP address. (IP addresses can be static or dynamic. A static IP address would always be the same every time a connect is made, whereas a dynamic IP address changes every time you connect.)