What are the main factors to gain customers orientation? there are trust, good relationship with customers, which one in the priority?

Understanding and satisfying customer needs, priorities & timeline.

trust between the customers should be established first and this will provide good relationship with them

Trust would be the priority but this should be followed with good customer relationship.

Certainly good relationship with customers and fostering trust between you and your customers are vital for good customer service. It is also very important to provide timely feedback to your clients (customers).

Satisfaction of customers needs.