In the ‘Spread the Jelly’ game mode you have to cover the entire board in a delicious jelly.
Spread the jelly by matching candies partly on the existing pink jelly and partly on the tiles not yet covered. It will then cover the tiles that weren’t already covered.
By creating and using booster candies you can spread the jelly further. Any striped/wrapped candy combos will blast the jelly if you make sure the combo match starts on the jelly.
Continue doing this to cover the entire board. If you fail to cover the whole board with jelly before running out of moves, you'll need to tackle it again!