What does roll in jelly-roll style mean?

"Roll in jelly-roll style" refers to a technique often used in cooking and baking, particularly when making desserts like cakes or pastries. It involves spreading a filling, such as jam or cream, over a flat sheet of cake or pastry, then rolling it up tightly from one end to create a spiral shape. This technique is commonly seen in recipes for jelly rolls or Swiss rolls, resulting in a visually appealing and delicious treat.