On the main screen, you'll seen an icon below your representing character that has a face in it. There will be times where a dot will appear and it will flicker. This indicates that you can claim rewards from Hohoian's Tribute.
The Tribute system provides you with rewards that can be accumulated within 24 hours. The items that you can get are the following:
Relic Pieces
Random Scroll
You can get double rewards if you purchase Hohoian Double Reward (7 days). This system provides you with steady Gold and Relic pieces, while the grade given out is rare. It's a way that lets you check in each day so you can claim free items.
We have questions and answers related to this topic which may also help you: