What is the metal activity series used for?
The activity series allows us to predict whether a metal displacement reaction will occur.
You can read about the metal activity series at
We can use the series to predict whether a metal displacement reaction will occur.
For example, zinc is above copper in the series. We predict that placing a strip of zinc metal in a copper(II) sulfate solution will produce metallic copper and zinc sulfate.
Copper is below zinc in the series. We predict that a strip of copper placed into a zinc sulfate solution will not produce a reaction.