The term "Penny Post" refers to a postal system that allowed letters to be sent for a uniform fee of one penny. Introduced in the United Kingdom in 1840, it revolutionized communication by making it affordable for the general public. The system was established by Rowland Hill, who advocated for postal reform and the use of prepaid postage stamps. The first postage stamp, known as the Penny Black, was issued in 1840 and featured a profile of Queen Victoria. The Penny Post made it easier for people to send letters, contributing to increased literacy and the spread of information. This system laid the groundwork for modern postal services worldwide.