Answer :

Happyamandapand
Both were agricultural laborers, but serfs were "unfree." Not slaves, but they were tied to the land in a way that peasants weren't, exactly.

They had rights, but they had more obligations to their lord and his manor. They had to work a certain number of days for him (for free) and they had to stay in the area (or get permission to go elsewhere).
unit274
both were agricultural workers,but serfs were unfree.unlike slaves,serfs were tied down to the land their master owned.serfs had rights and more obligations to their lord and his manor.so you cansay that slaves were a lower class than serfs