Loyalty of the client: It is divided into two parts.
Loyalty behavior: This is what is known as customer retention, since it refers to when the regular customer decides to reuse your product or service instead of the competition. When you buy the same product more than once.
Attitude of loyalty: Are the opinions and feelings that a customer expresses about their products or services. This is almost always strictly related to the repeat purchase of the customer.
Answer:
Trust. If confidence increases, loyalty tends to grow.