According to the description, the water purifier you bought should use cationic resin to replace calcium and magnesium ions in water with sodium ions, so there is no scale after boiling, and the taste is a bit bitter. This kind of water can be used for bathing and washing clothes, and it is not suitable for drinking.
The importance of taste to human body lies in ensuring the safety of food. Feeling bitter means that your body doesn't need this kind of water, or it is harmful to your body.