The basic thing is that both parties understand each other: this is the basis of communication. If there are one or more barriers, i.e. difficulties, the information will not flow well and the correct message will not be interpreted.
So, having a good customer service is about meeting the communication needs they have, both effectively and efficiently. That is, providing real and concrete solutions, in a short period of time. Honesty and active listening are necessary to give the relevance that each client has for the company.
The consequence is to have a satisfied customer who may remain loyal for future purchases. It is one of the most effective ways to produce a link between the two parties.