Final answer:
Word-of-mouth marketing is when someone becomes part of your sales force by recommending your products or services to their friends, colleagues, and family. It is a powerful and cost-effective marketing strategy that relies on personal recommendations to generate new customers.
Step-by-step explanation:
When someone becomes part of your sales force by telling their friends, colleagues, and family about your products and services, it is called word-of-mouth marketing or referral marketing. This type of marketing relies on personal recommendations to generate new customers. By encouraging people to share positive experiences and recommend your products or services, you can expand your customer base and increase sales. Word-of-mouth marketing is a powerful and cost-effective tool for businesses to leverage.