I believe the most important qualities of a successful sales representative is being convincing, knowing your product, having marketing skills, being well spoken, knowing your consumer, knowing your customer, your target market, and being confident in yourself and in the company that you're representing. I think these are important qualities to have because that is how you bring in the sale. It's important to be good at selling an item because that is your job to make a sale, so if you're unable to do that then you're unable to do your job. So it's important for a salesperson to be good at what they do.