What does starch do to a filling?

Starch is a type of carbohydrate that is found in many plants, including potatoes, corn, and wheat. It is a white, powdery substance that is used as a thickening agent in many recipes. When starch is added to a liquid and heated, it absorbs water and swells, creating a thick, gooey mixture. This property of starch makes it ideal for use in fillings, as it helps to bind the ingredients together and create a smooth, cohesive texture.