Stamps are small pieces of paper that you stick on letters and packages to show that you've paid for postage. They come in various designs, often featuring famous people, places, or events. When you buy a stamp, you help support the postal service, which delivers your mail to its destination. Collecting stamps, known as philately, is a popular hobby for many people around the world. Stamp collectors enjoy finding rare or unique stamps, and they often learn about history and culture through their collections. Some stamps can even be quite valuable, making them interesting both for sending mail and for collecting.