Shipping lines are companies that operate cargo ships to transport goods across oceans and seas. They play a crucial role in global trade by connecting manufacturers and consumers in different countries. These companies manage fleets of vessels that carry various types of cargo, including containers, bulk goods, and liquids. Shipping lines typically offer services such as freight forwarding, logistics, and customs clearance. They operate on established routes and schedules, ensuring timely delivery of goods. Major shipping lines include Maersk, MSC, and CMA CGM, which are known for their extensive networks and large container ships.