Root Beer primary flavour comes from the delightfully named Sassafras plant however this is now an artificial flavour as the Sassafras root was banned in food production.. It has quite a distinct and a unique flavour that is unlike anything else. It is hugely popular in the United States with each state producing it and there being hundreds of brands throughout the country. There are very few brands from other nations around the world but the flavour often varies considerably from the typical North American drink.
A&W is arguably the most popular brand of root beer in the states. It has been around since 1922 and is still going strong.
Root Beer is often enjoyed with a dollop of ice cream as the well-known root beer float.