Is human relations, inter personnel skills necessary to do sales?

Absolutely! In sales we need to be good to people at all times. Interpersonal skills help maintain long term relations with the clients.

Certainly, this is right. and relations create the trust of the brands.

In my opinion is essential socializing skills for any sale and generate empathy from the beginning. This defrost dialogue with Buyer of Good and Services

Aggregately these skills are part of the Soft Skills that have to do with the way we relate with other human beings. Likewise, a sale can only be made to another human being and simply put some kind of interaction needs to happen for that to succeed. The interaction needs to be a positive one for a sales person to also succeed and that takes interpersonal skills inclusive of persuasion and similarly some empathy...