What means by water on the side when serving whiskey?

Here's why this is done:

* Dilution: Water can be used to dilute the whiskey, making it less strong and more palatable for some drinkers. A few drops can significantly change the flavor profile, bringing out subtle notes and making it easier to appreciate the spirit.

* Cleansing the Palate: Water helps to cleanse the palate between sips, allowing you to fully experience the flavors of each sip of whiskey.

* Hydration: Whiskey is dehydrating, so offering water helps to keep drinkers hydrated, especially if they are enjoying the whiskey over an extended period.

* Personal Preference: Some drinkers simply prefer to have a glass of water on hand while they enjoy their whiskey.

The tradition of serving water with whiskey is common in many parts of the world, especially in countries with a strong whiskey culture like Scotland, Ireland, and the United States. It's a simple gesture of hospitality and demonstrates a good understanding of whiskey etiquette.