The title of the article is "Your Zip Code Is What?" The article directly answers the question by providing a clear and concise explanation of what a zip code is and its significance. It explains that a zip code is a five-digit number used in the United States to identify a specific geographic area for mail delivery. The article also highlights the importance of zip codes in ensuring accurate and efficient mail delivery. Additionally, it mentions that zip codes can be used for various purposes, such as determining the location of a residence or business, and can be helpful in various online services and applications.