The must know ABCs of proper customer handling

A customer is the best thing that can ever happen to a business. For the investors, it's a milestone towards the realization of the venture's goals e.g. Longevity in business, profitability, market leadership, contribution to nation's economic growth, social impact etc. 

To the employees, it's the customers who pay their salaries...the investor only handles the monies. Knowing this, the customer ought to be treated as king and queen or the business would sink irrecoverably.In the year 2014, I attended a customer care workshop and learnt the following about the word "customer";