A street address is a specific location identifier for a building or property, typically used for mail delivery and navigation. It usually consists of a number, street name, city, state, and postal code. For example, in the address 123 Main St, Springfield, IL 62701, "123" is the building number, "Main St" is the street name, and the rest indicates the city, state, and postal code. Street addresses help people find places easily and are essential for services like emergency response, deliveries, and transportation. They are standardized in many countries to ensure consistency and efficiency in locating properties and providing services.