Riesling is a type of grape, it is used to make white wines. Most famous are the German Riesling wines. A common misconception is that all rieslings are sweet. This is not the case, many rieslings...
It really depends on what you are serving it with. If it is with dinner serve it with a red meat such as prime rib or a good steak. The old rule white wine with white meat and red wine with red meat...