Understand that serfdom is a historical concept representing an outdated social system. Serfdom structured many medieval societies, but it no longer exists today.
Pro Tip 2/3
Non-Voluntary
Remember that serfs did not choose their status; it was forced upon them. Those born into serfdom had no option but to serve the local lord.
Pro Tip 3/3
Protection Exchange
Serfdom involved serfs getting protection from lords in exchange for their services. In serfdom, the lord's promise of safety justified the serfs' labor.