Copper is a good conductor when pure, is easily bent and doesn't corrode. This is a winning combination which makes it ideal for -

  1. Water pipes and gas pipes, because it can be easily bent into shape (it's malleable) by hand, without fracturing.
  2. Electrical wiring, because it can be easily bent around corners and conducts very well.
  3. It forms useful non-corroding alloys such as brass and bronze.

The drawbacks of copper are its price and lack of strength.