The sales department is often tasked with meeting certain targets of product or service sales. They would meet periodically and discuss sales strategies and tactics to try and sell you more of something!
For example…
Consider the sales department of a telecommunications business, they might have teams for each channel of sales. There might be the online sales channel responsible for handling queries and sales of the telco’s products online. There would be a call centre tasked with selling products and responding to questions associated with them. Typically, there would also be retail outlets with a team of salespeople and maybe even door-to-door salesmen.