What is a frequency card typically used for?

A frequency card is primarily used in marketing and customer relationship management to reward customers based on their spending or shopping frequency. These cards function as a tool for businesses to track how often customers make purchases and the amounts spent, thereby enabling the organization to offer incentives tailored to the customer's buying behavior.

By analyzing the purchase frequency, businesses can implement loyalty programs where customers receive benefits, such as discounts or points, the more frequently they shop. This strategy encourages repeat business, enhances customer loyalty, and can ultimately lead to increased revenue. The effectiveness of frequency cards lies in their ability to transform customer engagement into measurable outcomes that benefit both the consumer and the business.

The other options do not align with the primary purpose of a frequency card. Tracking customer complaints over time is more related to customer service metrics, while calculating annual sales growth involves broader financial analysis. Monitoring employee performance metrics pertains to human resources and is not relevant to customer engagement strategies.