Some countries like Bahrain, Kuwait, Tunisia, Oman, etc has 3 decimal currencies. So with this feature, you can adjust the decimal significant figures for currency & quantity.

The default precision is 2 for currency & quantity if you want to change it follow the below steps:

1. Go to config/constants.php
2. Change currency_precision value to change the precision for currency. The maximum is 4.
3. Change quantity_precision value to change the precision for quantity. The maximum is 4.