Shipping costs refer to the fees charged by a carrier to transport goods from one location to another. These costs can vary based on several factors, including the weight and size of the package, the distance it needs to travel, and the shipping method chosen. For example, sending a small package across town will typically be cheaper than shipping a large box across the country. Additionally, shipping costs can also include extra fees for services like tracking, insurance, or expedited delivery. Many online retailers, such as Amazon or eBay, often provide options for free shipping, which can attract more customers. Understanding these costs helps consumers make informed decisions when shopping online.