فرض عين and فرض كفاية

"فرض عين" is obvious from its name that it means (individual obligation). That is, it is an obligation on every single Muslim.
"فرض كفاية" is an obligation on a group of Muslims. That is, if enough people perform the obligation, then the obligation is released from the rest of Muslims. If nobody does it, all Muslims are held accountable.


An example of Fardh Kifaaya is Jihad at-Talab wad-Da'wah (Offensive and Preaching Jihad). And Allaah knows best.