"Via" is like a tiny hole that connects different layers of a circuit board. Imagine you have a layer cake, with frosting between each layer. Now imagine you put a straw through the cake, poking through all the layers. That straw is like a via—it connects those different layers so the cake can be enjoyed as a whole. In electronics, a via is used to connect different parts of a circuit board so the electricity can flow smoothly and make all the gadgets we love work properly.