As you progress through Neverwinter, the Well of Dragons is an intensive campaign area with much to do. One of the most important things you can do is read the following guide on how to run Heralds of Tiamat to load up on currencies for the campaign.
http://nwobarthos.com/2016/07/02/neverwinter-well-dragons-guide-heralds-temple-tiamat/
You are trying to earn as many dragon hoard coffers and coins as you can, to donate in exchange for Linu's Favor to spend on Linu's Items. 8-)