Overview
Pale ale is a golden to amber coloured beer style brewed with pale malt. The term first appeared in England around 1703 for beers made from malts dried with high-carbon coke, which resulted in a lighter colour than other beers popular at that time. Different brewing practices and hop quantities have resulted in a range of tastes and strengths within the pale ale family.
History
Coke had been first used for dry roasting malt in 1642, but it was not until around 1703 that the term pale ale was first applied to beers made from such malt. By 1784, advertisements appeared in the Calcutta Gazette for "light and excellent" pale ale.
By 1830, the expressions bitter and pale ale were synonymous. Breweries tended to designate beers as "pale ales", though customers would commonly refer to the same beers as "bitters". It is thought that customers used the term bitter to differentiate these pale ales from other less noticeably hopped beers such as porters and milds.
By the mid to late 20th century, while brewers were still labeling bottled beers as pale ales, they had begun identifying cask beers as "bitters", except those from Burton on Trent, which tend to be referred to as "pale ales".
From Wikipedia (CC BY-SA 4.0).