Basically you talk to NPC Fiametta after finishing prequests daily and go on voyages to collect denaros as well as unlock other parts of the map
Click Enter Trade for Solo Runs and Move to the Merchant Union trade location for 3-party runs. These dailies are not shared and the 3 party runs can only be run 3 times
Energy is Used everytime you enter a voyage.
How to Enter Merchant Union
You must complete voyages upto Herbtown for a Herbtown License
To unlock herbtown you must unlock prior voyages. A requirement is stated at the bottom of each map selection on which voyages must be completed and how many times.
After you receive the herbtown license from the voyage talk to NPC Fiametta to complete the quest.
You can now do Merchant Union 3 times a day with 2 other party members. The drop rates for gear is higher in union as well as cubes and fragments