The imperial pilsener is a stronger version of a Pilsener, having a higher hop content (and therefore usually more bitter) and greater malt and alcohol levels, raising the complexity and depth typical of the base style. The flavors and aromas are therefore comparable to a pilsener, much like in the ale world an IPA or dIPA might compare to a Pale Ale. This Imperial Pilsener style has risen in popularity among innovative US craft brewers during the last five years and is used on beerpal to distinguish a specifc class of beers from standard pilseners or basic strong lagers.