The three main types of shipping are air, sea, and land transportation. Air shipping is fast but expensive, sea shipping is slower but more cost-effective for large quantities, and land shipping can be done by truck, rail, or other vehicles for shorter distances or inland transportation. The choice of shipping method will depend on the nature of the cargo, the distance and destination, and the time and budget constraints. It's important to consider factors such as speed, cost, reliability, and safety when choosing a shipping method.