State borders are the defined lines that separate one state from another within a country. These borders can be natural, such as rivers and mountains, or artificial, created by legal agreements or historical events. They help establish the jurisdiction of state laws and governance. In the United States, for example, each of the 50 states has its own borders, which are often marked by signs. Understanding state borders is important for various reasons, including travel, trade, and political representation. They also play a role in cultural identity, as different states may have unique customs and traditions.