The Quest
A quest is a single operation with a particular goal: burgle a Lord's manor, rescue hostages from a bandit camp, retrieve an artifact from ancient ruins, etc.
A quest can be long and involved or short and sweet. There might be lots of rolls and trouble, or just a few actions to resolve it. Play to find out what happens! A quest doesn’t need to fill one session of play every time. Let it be however long it is.
The PCs can find a new quest by choosing a target (from the faction list, for example), by approaching a potential client and asking for work, or by being contacted by an NPC who needs to hire a party for a job.