A breadboard is a simple tool used to build and test electronic circuits without soldering. It has a plastic body with many small holes arranged in rows and columns. Inside, these holes are connected with metal strips, so when you insert wires or electronic components like resistors, LEDs, or ICs, they get connected automatically. The middle area is used for placing components, while the side rails are usually used for power supply connections (+ and –). Because it is reusable and easy to use, a breadboard is very popular among students, hobbyists, and engineers for experimenting with circuits before making a permanent design on a printed circuit board (PCB). It helps in learning, prototyping, and testing circuits quickly.