This metal is an industrial metal used mainly in building and construction such as electrical work and plumbing. This is often considered as an accurate measure of economic growth. If the demand for copper is increasing you will usually see at the same time as this an economic expansion.
Chile, Peru, South Africa, North America and China are the largest producers of copper. Any political unrest in the main producing countries, strikes or shipping problems could all cause the price of copper to fluctuate quite considerably.