This is because most wine bottle labels are named after (producer name + grape type + production area name). And many old world wine bottle labels are even only (producer name + production area name). Because some areas are so important to local influences that they think consumers should know what grape they are using and what flavor they are brewing.
The scientific name of the wine region is called the Geographical Indications (GIs), and the World Trade Organization WTO has established a GIs system for use by all major wine producing countries. He can effectively help consumers quickly find the key information in the bottle logo, and initially judge whether a bottle of wine is good or bad.