That could help you to break candies automatically and will give chance to make special candy by mixing more same color candies.
To pass this level, you must clear 32 double squares in 14 or fewer.
For this level try to play near to chocolates and make special candy.
Candy Crush Level 2962 Video The video below demonstrates how I completed the level.
You could play with remaining jelly candy to break them instead of wasting moves.
When you complete the level, is activated and will score you additional points.