Bock is a strong style of beer that originated in Germany. It is typically dark in color and has a rich, malty flavor profile, often with notes of caramel and toffee. Bock beers are usually brewed in the winter months and are known for their higher alcohol content compared to regular lagers. There are several sub-styles of bock, including Doppelbock, which is even stronger and maltier, and Eisbock, which is concentrated by freezing and removing ice. Bock is traditionally enjoyed during festivals and celebrations, making it a popular choice during the Oktoberfest season.