Bacon is cured, smoked pork cut from the side of the pig. Bacon is probably one of the most commonly eaten pork products in the U.S. with 53% of all families statistically keep bacon in their refrigerator.
Streaky bacon is a British term for bacon with streaked with fat, similar to our standard smoked bacon in the U.S.
Rashers are pieces of streaky bacon (aka American bacon).
In the U.K. what we refer to as bacon, they refer to as "rashers" or "streaky bacon".
According to the Pork Board, the average American eats 17.9 pounds of bacon per year. In the early 2000's bacon became so popular as a food addition that you'd see it used in beverages, added to chocolate and other desserts and even sushi although most of those fads have faded from restaurant menu's.