One key advantage personal selling has over other promotional methods is that it is a two-way form of communication. In selling situations the message sender (e.g., salesperson) can adjust the message as they gain feedback from message receivers (e.g., customer). So if a customer does not understand the initial message (e.g., doesn’t fully understand how the product works) the salesperson can make adjustments to address questions or concerns. Many non-personal forms of promotion, such as a radio advertisement, are inflexible, at least in the short-term, and cannot be easily adjusted to address audience questions.
The interactive nature of personal selling also makes it the most effective promotional method for building relationships with customers, particularly in the business-to-business market. This is especially important for companies that either sell expensive products or sell lower cost but high volume products (i.e., buyer must purchase in large quantities) that rely heavily on customers making repeat purchases. Because such purchases may take a considerable amount of time to complete and may involve the input of many people at the purchasing company (i.e., buying center), sales success often requires the marketer develop and maintain strong relationships with members of the purchasing company.
Finally, personal selling is the most practical promotional option for reaching customers who are not easily reached through other methods. The best example is in selling to the business market where, compared to the consumer market, advertising, public relations and sales promotions are often not well received.