Lager beer is a type of beer that is fermented and conditioned at low temperatures. It is known for its clean, crisp taste and is typically lighter in color compared to other beer styles. The fermentation process involves Saccharomyces pastorianus, a yeast that works best in cooler environments, resulting in a smooth flavor profile. There are various styles of lager, including Pilsner, Helles, and Dunkel, each with unique characteristics. Lagers are often carbonated and have a refreshing quality, making them popular choices for casual drinking. They are enjoyed worldwide and are a staple in many beer cultures.