Cold calling refers to the practice of making unsolicited phone calls or visits to potential customers in order to sell a product or service. This method of sales involves reaching out to individuals who have not expressed interest in the product or service being offered, often with little to no prior knowledge about the customer. It requires a persuasive and confident approach, as well as the ability to quickly adapt to different personalities and objections. While it can be a challenging and often unpredictable form of sales, successful cold calling can result in new and valuable business opportunities.