Step 1 : Introduction to the question "What was the name of the world’s first official postage stamp, introduced in the 19th century?"
...Issued in 1840 by the United Kingdom, the Penny Black holds the distinction of being the world’s first adhesive postage stamp made available for public use. The stamp prominently featured a profile of Queen Victoria, whose likeness was chosen to symbolize stability and national identity. Priced at one penny, the Penny Black allowed letters weighing up to half an ounce to be mailed anywhere within Britain, regardless of distance—a radical departure from the previous system, which often required recipients to pay postage upon delivery.
