How you can know who can buy your product ?

What is your intutions in seeing the individual who enters into your company door for the first time and the usual ones?, how many of your employees know the company strategy? because here even when off work you know your goals will be attained otherwise. How you handle the customer? did you create a condusive customer environment?, its not about persuations for the customers to buy your product but if they buy the products can these customers come back for more. 

Ill make research in the market of similar products, who is buying, gender, age. After will make some interesting promotion. If the product is new and no similar in the market, advertising will help to understand, who is your customer