For the business, ethical training can:
•   Increase productivity and profitability:
When employees follow ethical codes of conduct, they do not act inappropriately, cut corners or short-change customers. Effort is put into productive activities instead of being diverted to questionable practices.
•   Increase the public image:
 Today's customers are careful about with whom they do business. A commitment to ethics training is a commitment to act responsibly and do the right thing. Customers like to do business with companies they can trust.
•   Reduce the number of legal issues:
 When everyone is working systematically in accordance with a clear code of conduct, then the business is far less likely to face any problems of legal liability.
Source: 
https://bizfluent.com/how-7733543-understand-business-ethics.html