Personal selling involves face-to-face interactions between salespeople and customers to sell products. It develops relationships through oral conversations and quick solutions to queries. The key functions of personal selling are to make new and repeat sales, provide customer service, track sales records, give presentations, and develop goodwill for the company. The personal selling process includes prospecting, preparing by gathering information, making an approach, delivering a sales presentation, addressing objections, closing the sale, and following up with customers.