Ok experts let's discuss this "Sales means to serve!" Customer service is the name of the game!

The word sales comes from a Scandinavian word meaning “to serve”.

Serving the needs of your customers should be the top priority in your business because service will generate the sale. 

The sale will never generate another sale without the service.

Any business from A to Z is about customer service. Sales and Customer services  departments are those who are serving the customers directly, but other departments in the company are also serving the customer, but from behind the scenes.

Yes indeed Customer Service is the name of the business game

With experts

Thank you for the invitation

Top Priority with sense of urgency.

Thank You all very much for your participation, i agree with you Sirs/Madams.

"Customer service" is the name of the operation in what it includes:

Product development

Marketing 

Sales process / customer service (literally)

Payment process

After sales services 

Follow up

Mentioned " customer service" is the target of every industry or business to get customer satisfaction and closed sales.

fully agree with the answers been added by EXPERTS..................... Thanks