Selling products or services to customers, and representing the brand. This can include asking questions to pinpoint the best offerings, giving demos or presentations, and maintaining customer relationships. Reaching out to potential leads through a variety of channels, such as email, phone, text, and social media. A sales professional can be a sales representative or manager of the sales department in a business or organization. Your duties as a sales representative are to develop and maintain customer relationships, sell company product or services to customers, and keep a record of your inventory and sales. A sales professional can be a sales representative or manager of the sales department in a business or organization. Your duties as a sales representative are to develop and maintain customer relationships, sell company product or services to customers, and keep a record of your inventory and sales.