What does PCB mean in electronics?

PCB stands for printed circuit board

The PCB is used for mechanical support of the components (e.g. resistor, capacitor, transistor, etc.). .

Let’s say you want to create a water indicator in your home. Here is the circuit for water level indicator

So if you want to make this circuit you need a board that is printed circuit board or PCB . This is the picture of PCB of water level indicator

This for permanent support . If you want to make a prototype then you need a bread board shown below

Image source: Google

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