A more thorough explanation:

Definition: Goods transported by a vessel, airplane, or vehicle; FREIGHT(1).

Examples:

• General cargo: Goods and materials of various types transported by carriers, often in a common load, with few or no restrictions. Examples include clothing, electronics, and food products.
• Hazardous cargo: Dangerous goods or materials whose carriage is usually subject to stringent regulatory and statutory restrictions. Examples include chemicals, explosives, and radioactive materials.

The examples illustrate the definition of cargo as goods that are transported by various means of transportation. General cargo refers to goods that are commonly transported without many restrictions, while hazardous cargo refers to goods that are dangerous and require special handling and regulations.