The NPC gives you the option for it to automatically play out your daily tasks. You need to use an 'Auto-Play Card' which you can get 1 per day.

So one card is valid for just one activity and one day?

where is that npc?

The NPC is by the Black Market Merchant.

Basically 1 card = Will put you in "Offline Mode" completing your daily missions and will last until 5:00 Server time. (daily reset time)

There is a list of Dailies to do at the merchant and it will give you 1 card per mission completed. Once you've completed the mission it should add the ticket(s) to your bag.