A Single Overhead Camshaft (SOHC) is an engine design where one camshaft is located in the cylinder head, controlling both the intake and exhaust valves. This setup simplifies the engine's design and reduces weight, making it a popular choice for smaller or less powerful engines. SOHC engines typically have fewer moving parts compared to Double Overhead Camshaft (DOHC) engines, which can lead to lower manufacturing costs and easier maintenance. However, they may not provide the same level of performance as DOHC designs, especially in high-revving applications where more precise valve timing is beneficial.