Do you think body language skills necessary to build strong relations with new customers and is it relevant to increase sales figures?

yes definitely you have strong body language to attract customer that we are working for him

My body language must be useful, it can be a presentation when I am explaining to them.

Body Language skills are indispensable in all areas because it is such a presentation, when we explain to peopleor customers, our body language can be useful, they can understand your explanation, body language as representatives of explanation