There are 2 daily missions and they are visible next to your avatar in the upper left corner of the screen. They are valid for 24 hours only. They are updated every day and if they are not completed on the respective day, you lose your progress and you will have 2 new missions.

When the check light is green - there are missions to complete.
When there is a red exclamation mark sign next to the missions, as in the bonus section, it means you have chips to collect.
When the check is in gold - all missions are completed.