France is the largest wine producing region in the world with a wide variety of wines to choose from. France, the "vine's great nation", occupies a position of preeminence in the wine world. Chardonnay in any other place is Chardonnay, but in France it can be Chablis, with a flavor unique to that location. The centuries of research they have done on the grapes has taught the French just which grapes grow in each particular area.
It may seem confusing at first to figure out what French wines are all about. But really, each region in France is known mostly for a single type of grape. If you get a bottle of Chablis, it is made from the Chardonnay grape. If you get a bottle of Beaujolais, it is made from gamay. If you study up which grapes are grown in which regions, you'll be all set!