Pepperoni comes from the United States. It is not an Italian product, but rather an Italian-American creation. It is a dried sausage that has become synonymous with pizza and Italian-American food.
The word pepperoni is similar to the Italian word peperoni, which means large peppers. The American word is used to describe an air-dried sausage that is soft and spicy. It is used primarily on pizzas but can also be found on deli trays and in sandwiches. Pepperoni was originally found in the pizza shops that began to show up in America in the early 1900s. It is distinct from the Italian salami that is found on true Italian sandwiches.