Hop, the flowers of the hop plant Humulus lupulus, belong to the Cannabaceae family of flowering plants. Hops is a plural word. One Single flower is called Hop.

They serve as a key ingredient in beer, providing bitterness, aroma, flavor, and stability, along with floral, fruity, or citrus notes. In addition to beer, hops are used in various beverages and herbal medicine.

Only female hop plants are used for commercial production, as they produce the desired cones.

The hop plant is a vigorous, climbing, herbaceous perennial typically grown on a string attached to a pole in fields known as hopfields, hop gardens (in the South of England), or hop yards (in the West Country and United States). Farmers cultivate many hop varieties worldwide, each suited for specific beer styles.

As brewing techniques advanced, hops became an integral part of beer styles across Europe.

The noble hop varieties of Germany, such as Hallertau, Tettnanger, and Spalt, defined the character of classic lagers, while the earthy, slightly spicy English hops like Fuggles and East Kent Goldings shaped the beloved ales of the British Isles.