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, featuring images of famous people, animals, or landmarks. When you buy a stamp, you help support the postal service, which delivers your mail to its destination. Collecting stamps is a popular hobby for many people around the world. Stamp collectors, also known as philatelists, enjoy finding rare or unique stamps to add to their collections. Some stamps can be quite valuable, especially if they are old or have printing errors, making this hobby both fun and potentially profitable.