The volume and tempo of the background music can significantly affect the traffic flow within your shop. When you play fast-tempo or loud background music, it can cause customers to move more quickly around the shop, but without reducing the volume of sales. So playing louder music when your shop is nearing closing time may help to push those last few customers to the checkout point a little quicker. However, playing loud music that doesn’t agree with your customer may also cause them a small amount of frustration and provide the customer with a negative shopping experience, that they themselves may not even be able to explain. People perceive shorter shopping time durations (compared to actual time spent in-store) when they hear music that they like, so long queuing times can feel shorter if you are playing agreeable music. Customers may not realise why they are enjoying a pleasant shopping experience, or even acknowledge any feeling other than indifference toward it at all, but subconsciously they will be correlating your shop with a positive shopping experience and will be more likely to shop there again.