To have an idea of what you're drinking is useful for several reasons.
Firstly, you can protect yourself from drinking too much. To do this, it's good to know your norm and try not to go overboard. The damage alcohol can cause has long been proven, but it is also known that moderate drinking may have beneficial effects on human health and body. For example, a noble drink such as wine, in acceptable doses, strengthens the walls of blood vessels and reduces cholesterol levels. And the favorite drink of men in all countries – beer – is full of vitamins and minerals.
And secondly, this knowledge will allow you to show your intelligence and gain a reputation of a polymath, which is also a big bonus.