In French tradition, an unopened bottle of wine is typically not kept in the refrigerator before serving. Wine is generally stored at a cool, consistent temperature in a wine cellar, wine fridge, or a cool, dark place in the home.
However, there are some exceptions to this general rule. If you are serving a white wine or a rosé, you might want to chill it slightly before serving. In this case, you can place the unopened bottle in the refrigerator for about 30 minutes to an hour before serving, depending on the starting temperature of the wine and your desired serving temperature. This will help enhance the flavors and aromas of these types of wine.
For red wine, it is typically not served as cold as white or rosé wine. However, if the room temperature is quite warm, you might consider cooling a red wine in the refrigerator for a short time, but it should not be served too cold.
After opening the bottle for drinking, you may want to store any remaining wine in the refrigerator to preserve its freshness. Sealing the bottle with a wine stopper or a cork and placing it in the fridge will slow down the oxidation process and help the wine last longer.
Remember that serving temperatures can vary depending on personal preferences and the specific wine being served. If you're unsure, it's always a good idea to check the recommended serving temperature for the particular type of wine you have.