Daily Quest contains six prize tasks to complete, and you can get the Grand Chest if you complete all tasks.
Once you have a required item on your board to complete a task, you will see a purple checkmark near the item.
Please open your game's main page and click on the purple chest icon at the top-left corner to see and complete the Daily Quest tasks.
Press the 'Collect' button on a task to complete it and claim its reward. The required item will be removed from your board, and the prize basket will be added to your item queue under your game board.
You can tap on your baskets to spawn items. The basket will destroy itself after emptying it.