A tapering jig is a tool that helps you make pieces of wood that are narrower on one end than the other. Think of it like a ramp that slopes down from one end to the other. It's kind of like a special tool that helps you cut wood in a specific way. When you need a piece of wood to be narrower on one end than the other, you can use a tapering jig to help you do it. You put the wood into the tapering jig and then move the jig and the wood together over a saw. The saw cuts the wood at a specific angle so that one end is narrower than the other. It's a really helpful tool when you need to make special shapes with your wood.