The American Strong Ale is a catch-all style for beers that don't fit within a preexisting category and also have an ABV of 7% or more.
Appearance can vary greatly, but most fall between a light amber and a medium to dark brown. The type of malts and hops used in this style can vary greatly, but one thing is for sure - this beer will not be subtle. With ABV reaching around 20% in the upper range, the malt and hops used to balance the ethanol flavors are going to be intense and complex. Most beers of this style are special releases or seasonal - so be sure to keep an eye out for them when shopping!
Serving temperatures vary widely, but usually either cool (46-54 degrees) or warm (58-61 degrees) is a safe bet. Best served in a beer snifter, a stemmed tulip glass, or even a large wine glass.